diff --git a/CTestConfig.cmake b/CTestConfig.cmake
index 0557c491a..4c0027824 100644
--- a/CTestConfig.cmake
+++ b/CTestConfig.cmake
@@ -4,10 +4,14 @@
 ## # The following are required to uses Dart and the Cdash dashboard
 ##   ENABLE_TESTING()
 ##   INCLUDE(CTest)
-set(CTEST_PROJECT_NAME "Eigen3.2")
+set(CTEST_PROJECT_NAME "Eigen")
 set(CTEST_NIGHTLY_START_TIME "00:00:00 UTC")
 
 set(CTEST_DROP_METHOD "http")
 set(CTEST_DROP_SITE "manao.inria.fr")
-set(CTEST_DROP_LOCATION "/CDash/submit.php?project=Eigen3.2")
+set(CTEST_DROP_LOCATION "/CDash/submit.php?project=Eigen")
 set(CTEST_DROP_SITE_CDASH TRUE)
+set(CTEST_PROJECT_SUBPROJECTS
+Official
+Unsupported
+)
diff --git a/Eigen/src/Cholesky/LDLT.h b/Eigen/src/Cholesky/LDLT.h
index f34d26465..b43e85e7f 100644
--- a/Eigen/src/Cholesky/LDLT.h
+++ b/Eigen/src/Cholesky/LDLT.h
@@ -291,13 +291,6 @@ template<> struct ldlt_inplace<Lower>
         cutoff = abs(NumTraits<Scalar>::epsilon() * biggest_in_corner);
       }
 
-      // Finish early if the matrix is not full rank.
-      if(biggest_in_corner < cutoff)
-      {
-        for(Index i = k; i < size; i++) transpositions.coeffRef(i) = i;
-        break;
-      }
-
       transpositions.coeffRef(k) = index_of_biggest_in_corner;
       if(k != index_of_biggest_in_corner)
       {
@@ -333,6 +326,7 @@ template<> struct ldlt_inplace<Lower>
         if(rs>0)
           A21.noalias() -= A20 * temp.head(k);
       }
+      
       if((rs>0) && (abs(mat.coeffRef(k,k)) > cutoff))
         A21 /= mat.coeffRef(k,k);
 
@@ -518,12 +512,12 @@ struct solve_retval<LDLT<_MatrixType,_UpLo>, Rhs>
     typedef typename LDLTType::RealScalar RealScalar;
     const Diagonal<const MatrixType> vectorD = dec().vectorD();
     RealScalar tolerance = (max)(vectorD.array().abs().maxCoeff() * NumTraits<Scalar>::epsilon(),
-				 RealScalar(1) / NumTraits<RealScalar>::highest()); // motivated by LAPACK's xGELSS
+                                 RealScalar(1) / NumTraits<RealScalar>::highest()); // motivated by LAPACK's xGELSS
     for (Index i = 0; i < vectorD.size(); ++i) {
       if(abs(vectorD(i)) > tolerance)
-	dst.row(i) /= vectorD(i);
+        dst.row(i) /= vectorD(i);
       else
-	dst.row(i).setZero();
+        dst.row(i).setZero();
     }
 
     // dst = L^-T (D^-1 L^-1 P b)
diff --git a/Eigen/src/Core/ArrayWrapper.h b/Eigen/src/Core/ArrayWrapper.h
index 21830745b..4bb648024 100644
--- a/Eigen/src/Core/ArrayWrapper.h
+++ b/Eigen/src/Core/ArrayWrapper.h
@@ -49,7 +49,7 @@ class ArrayWrapper : public ArrayBase<ArrayWrapper<ExpressionType> >
     typedef typename internal::nested<ExpressionType>::type NestedExpressionType;
 
     EIGEN_DEVICE_FUNC
-    inline ArrayWrapper(ExpressionType& matrix) : m_expression(matrix) {}
+    EIGEN_STRONG_INLINE ArrayWrapper(ExpressionType& matrix) : m_expression(matrix) {}
 
     EIGEN_DEVICE_FUNC
     inline Index rows() const { return m_expression.rows(); }
diff --git a/Eigen/src/Core/AssignEvaluator.h b/Eigen/src/Core/AssignEvaluator.h
index 5b5d29ca9..5451a138f 100644
--- a/Eigen/src/Core/AssignEvaluator.h
+++ b/Eigen/src/Core/AssignEvaluator.h
@@ -574,13 +574,13 @@ public:
   template<int StoreMode, int LoadMode>
   void assignPacket(Index row, Index col)
   {
-    m_functor.assignPacket<StoreMode>(&m_dst.coeffRef(row,col), m_src.template packet<LoadMode>(row,col));
+    m_functor.template assignPacket<StoreMode>(&m_dst.coeffRef(row,col), m_src.template packet<LoadMode>(row,col));
   }
   
   template<int StoreMode, int LoadMode>
   void assignPacket(Index index)
   {
-    m_functor.assignPacket<StoreMode>(&m_dst.coeffRef(index), m_src.template packet<LoadMode>(index));
+    m_functor.template assignPacket<StoreMode>(&m_dst.coeffRef(index), m_src.template packet<LoadMode>(index));
   }
   
   template<int StoreMode, int LoadMode>
diff --git a/Eigen/src/Core/CommaInitializer.h b/Eigen/src/Core/CommaInitializer.h
index 2bbf74b05..70cbfeff5 100644
--- a/Eigen/src/Core/CommaInitializer.h
+++ b/Eigen/src/Core/CommaInitializer.h
@@ -45,6 +45,18 @@ struct CommaInitializer
     m_xpr.block(0, 0, other.rows(), other.cols()) = other;
   }
 
+  /* Copy/Move constructor which transfers ownership. This is crucial in 
+   * absence of return value optimization to avoid assertions during destruction. */
+  // FIXME in C++11 mode this could be replaced by a proper RValue constructor
+  EIGEN_DEVICE_FUNC
+  inline CommaInitializer(const CommaInitializer& o)
+  : m_xpr(o.m_xpr), m_row(o.m_row), m_col(o.m_col), m_currentBlockRows(o.m_currentBlockRows) {
+    // Mark original object as finished. In absence of R-value references we need to const_cast:
+    const_cast<CommaInitializer&>(o).m_row = m_xpr.rows();
+    const_cast<CommaInitializer&>(o).m_col = m_xpr.cols();
+    const_cast<CommaInitializer&>(o).m_currentBlockRows = 0;
+  }
+
   /* inserts a scalar value in the target matrix */
   EIGEN_DEVICE_FUNC
   CommaInitializer& operator,(const Scalar& s)
@@ -110,7 +122,7 @@ struct CommaInitializer
   EIGEN_DEVICE_FUNC
   inline XprType& finished() { return m_xpr; }
 
-  XprType& m_xpr;   // target expression
+  XprType& m_xpr;           // target expression
   Index m_row;              // current row id
   Index m_col;              // current col id
   Index m_currentBlockRows; // current block height
diff --git a/Eigen/src/Core/MatrixBase.h b/Eigen/src/Core/MatrixBase.h
index 49b69f873..172929562 100644
--- a/Eigen/src/Core/MatrixBase.h
+++ b/Eigen/src/Core/MatrixBase.h
@@ -356,8 +356,6 @@ template<typename Derived> class MatrixBase
 
     Scalar trace() const;
 
-/////////// Array module ///////////
-
     template<int p> EIGEN_DEVICE_FUNC RealScalar lpNorm() const;
 
     EIGEN_DEVICE_FUNC MatrixBase<Derived>& matrix() { return *this; }
@@ -365,8 +363,10 @@ template<typename Derived> class MatrixBase
 
     /** \returns an \link Eigen::ArrayBase Array \endlink expression of this matrix
       * \sa ArrayBase::matrix() */
-    EIGEN_DEVICE_FUNC ArrayWrapper<Derived> array() { return derived(); }
-    EIGEN_DEVICE_FUNC const ArrayWrapper<const Derived> array() const { return derived(); }
+    EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE ArrayWrapper<Derived> array() { return derived(); }
+    /** \returns a const \link Eigen::ArrayBase Array \endlink expression of this matrix
+      * \sa ArrayBase::matrix() */
+    EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE const ArrayWrapper<const Derived> array() const { return derived(); }
 
 /////////// LU module ///////////
 
diff --git a/Eigen/src/Core/Ref.h b/Eigen/src/Core/Ref.h
index 00d9e6d2b..cd6d949c4 100644
--- a/Eigen/src/Core/Ref.h
+++ b/Eigen/src/Core/Ref.h
@@ -101,7 +101,7 @@ struct traits<Ref<_PlainObjectType, _Options, _StrideType> >
   template<typename Derived> struct match {
     enum {
       HasDirectAccess = internal::has_direct_access<Derived>::ret,
-      StorageOrderMatch = PlainObjectType::IsVectorAtCompileTime || ((PlainObjectType::Flags&RowMajorBit)==(Derived::Flags&RowMajorBit)),
+      StorageOrderMatch = PlainObjectType::IsVectorAtCompileTime || Derived::IsVectorAtCompileTime || ((PlainObjectType::Flags&RowMajorBit)==(Derived::Flags&RowMajorBit)),
       InnerStrideMatch = int(StrideType::InnerStrideAtCompileTime)==int(Dynamic)
                       || int(StrideType::InnerStrideAtCompileTime)==int(Derived::InnerStrideAtCompileTime)
                       || (int(StrideType::InnerStrideAtCompileTime)==0 && int(Derived::InnerStrideAtCompileTime)==1),
@@ -172,8 +172,12 @@ protected:
     }
     else
       ::new (static_cast<Base*>(this)) Base(expr.data(), expr.rows(), expr.cols());
-    ::new (&m_stride) StrideBase(StrideType::OuterStrideAtCompileTime==0?0:expr.outerStride(),
-                                 StrideType::InnerStrideAtCompileTime==0?0:expr.innerStride());    
+    
+    if(Expression::IsVectorAtCompileTime && (!PlainObjectType::IsVectorAtCompileTime) && ((Expression::Flags&RowMajorBit)!=(PlainObjectType::Flags&RowMajorBit)))
+      ::new (&m_stride) StrideBase(expr.innerStride(), StrideType::InnerStrideAtCompileTime==0?0:1);
+    else
+      ::new (&m_stride) StrideBase(StrideType::OuterStrideAtCompileTime==0?0:expr.outerStride(),
+                                   StrideType::InnerStrideAtCompileTime==0?0:expr.innerStride());    
   }
 
   StrideBase m_stride;
diff --git a/Eigen/src/Core/products/GeneralBlockPanelKernel.h b/Eigen/src/Core/products/GeneralBlockPanelKernel.h
index 98c3a5955..bb9e62ae5 100644
--- a/Eigen/src/Core/products/GeneralBlockPanelKernel.h
+++ b/Eigen/src/Core/products/GeneralBlockPanelKernel.h
@@ -1277,6 +1277,7 @@ EIGEN_DONT_INLINE void gemm_pack_rhs<Scalar, Index, nr, ColMajor, Conjugate, Pan
 template<typename Scalar, typename Index, int nr, bool Conjugate, bool PanelMode>
 struct gemm_pack_rhs<Scalar, Index, nr, RowMajor, Conjugate, PanelMode>
 {
+  typedef typename packet_traits<Scalar>::type Packet;
   enum { PacketSize = packet_traits<Scalar>::size };
   EIGEN_DONT_INLINE void operator()(Scalar* blockB, const Scalar* rhs, Index rhsStride, Index depth, Index cols, Index stride=0, Index offset=0);
 };
@@ -1298,12 +1299,18 @@ EIGEN_DONT_INLINE void gemm_pack_rhs<Scalar, Index, nr, RowMajor, Conjugate, Pan
     if(PanelMode) count += nr * offset;
     for(Index k=0; k<depth; k++)
     {
-      const Scalar* b0 = &rhs[k*rhsStride + j2];
-                blockB[count+0] = cj(b0[0]);
-                blockB[count+1] = cj(b0[1]);
-      if(nr==4) blockB[count+2] = cj(b0[2]);
-      if(nr==4) blockB[count+3] = cj(b0[3]);
-      count += nr;
+      if (nr == PacketSize) {
+        Packet A = ploadu<Packet>(&rhs[k*rhsStride + j2]);
+        pstoreu(blockB+count, cj.pconj(A));
+        count += PacketSize;
+      } else {
+        const Scalar* b0 = &rhs[k*rhsStride + j2];
+                  blockB[count+0] = cj(b0[0]);
+                  blockB[count+1] = cj(b0[1]);
+        if(nr==4) blockB[count+2] = cj(b0[2]);
+        if(nr==4) blockB[count+3] = cj(b0[3]);
+        count += nr;
+      }
     }
     // skip what we have after
     if(PanelMode) count += nr * (stride-offset-depth);
diff --git a/Eigen/src/Core/products/SelfadjointMatrixVector.h b/Eigen/src/Core/products/SelfadjointMatrixVector.h
index f698f67f9..fdc81205a 100644
--- a/Eigen/src/Core/products/SelfadjointMatrixVector.h
+++ b/Eigen/src/Core/products/SelfadjointMatrixVector.h
@@ -113,9 +113,9 @@ EIGEN_DONT_INLINE void selfadjoint_matrix_vector_product<Scalar,Index,StorageOrd
 
     for (size_t i=starti; i<alignedStart; ++i)
     {
-      res[i] += t0 * A0[i] + t1 * A1[i];
-      t2 += numext::conj(A0[i]) * rhs[i];
-      t3 += numext::conj(A1[i]) * rhs[i];
+      res[i] += cj0.pmul(A0[i], t0) + cj0.pmul(A1[i],t1);
+      t2 += cj1.pmul(A0[i], rhs[i]);
+      t3 += cj1.pmul(A1[i], rhs[i]);
     }
     // Yes this an optimization for gcc 4.3 and 4.4 (=> huge speed up)
     // gcc 4.2 does this optimization automatically.
diff --git a/Eigen/src/Core/util/Memory.h b/Eigen/src/Core/util/Memory.h
index 88cf1c30d..76447c5b6 100644
--- a/Eigen/src/Core/util/Memory.h
+++ b/Eigen/src/Core/util/Memory.h
@@ -274,12 +274,12 @@ inline void* aligned_realloc(void *ptr, size_t new_size, size_t old_size)
   // The defined(_mm_free) is just here to verify that this MSVC version
   // implements _mm_malloc/_mm_free based on the corresponding _aligned_
   // functions. This may not always be the case and we just try to be safe.
-  #if defined(_MSC_VER) && defined(_mm_free)
+  #if defined(_MSC_VER) && (!defined(_WIN32_WCE)) && defined(_mm_free)
     result = _aligned_realloc(ptr,new_size,EIGEN_ALIGN_BYTES);
   #else
     result = generic_aligned_realloc(ptr,new_size,old_size);
   #endif
-#elif defined(_MSC_VER)
+#elif defined(_MSC_VER) && (!defined(_WIN32_WCE))
   result = _aligned_realloc(ptr,new_size,EIGEN_ALIGN_BYTES);
 #else
   result = handmade_aligned_realloc(ptr,new_size,old_size);
@@ -464,7 +464,7 @@ template<typename T, bool Align> inline void conditional_aligned_delete_auto(T *
   * There is also the variant first_aligned(const MatrixBase&) defined in DenseCoeffsBase.h.
   */
 template<typename Scalar, typename Index>
-static inline Index first_aligned(const Scalar* array, Index size)
+inline Index first_aligned(const Scalar* array, Index size)
 {
   enum { PacketSize = packet_traits<Scalar>::size,
          PacketAlignedMask = PacketSize-1
@@ -492,7 +492,7 @@ static inline Index first_aligned(const Scalar* array, Index size)
 /** \internal Returns the smallest integer multiple of \a base and greater or equal to \a size
   */ 
 template<typename Index> 
-inline static Index first_multiple(Index size, Index base)
+inline Index first_multiple(Index size, Index base)
 {
   return ((size+base-1)/base)*base;
 }
diff --git a/Eigen/src/Geometry/Quaternion.h b/Eigen/src/Geometry/Quaternion.h
index 803001272..a712692e5 100644
--- a/Eigen/src/Geometry/Quaternion.h
+++ b/Eigen/src/Geometry/Quaternion.h
@@ -34,8 +34,9 @@ struct quaternionbase_assign_impl;
 template<class Derived>
 class QuaternionBase : public RotationBase<Derived, 3>
 {
+ public:
   typedef RotationBase<Derived, 3> Base;
-public:
+
   using Base::operator*;
   using Base::derived;
 
@@ -203,6 +204,8 @@ public:
   * \li \c Quaternionf for \c float
   * \li \c Quaterniond for \c double
   *
+  * \warning Operations interpreting the quaternion as rotation have undefined behavior if the quaternion is not normalized.
+  *
   * \sa  class AngleAxis, class Transform
   */
 
@@ -223,10 +226,10 @@ struct traits<Quaternion<_Scalar,_Options> >
 template<typename _Scalar, int _Options>
 class Quaternion : public QuaternionBase<Quaternion<_Scalar,_Options> >
 {
+public:
   typedef QuaternionBase<Quaternion<_Scalar,_Options> > Base;
   enum { IsAligned = internal::traits<Quaternion>::IsAligned };
 
-public:
   typedef _Scalar Scalar;
 
   EIGEN_INHERIT_ASSIGNMENT_EQUAL_OPERATOR(Quaternion)
@@ -334,9 +337,9 @@ template<typename _Scalar, int _Options>
 class Map<const Quaternion<_Scalar>, _Options >
   : public QuaternionBase<Map<const Quaternion<_Scalar>, _Options> >
 {
+  public:
     typedef QuaternionBase<Map<const Quaternion<_Scalar>, _Options> > Base;
 
-  public:
     typedef _Scalar Scalar;
     typedef typename internal::traits<Map>::Coefficients Coefficients;
     EIGEN_INHERIT_ASSIGNMENT_EQUAL_OPERATOR(Map)
@@ -344,7 +347,7 @@ class Map<const Quaternion<_Scalar>, _Options >
 
     /** Constructs a Mapped Quaternion object from the pointer \a coeffs
       *
-      * The pointer \a coeffs must reference the four coeffecients of Quaternion in the following order:
+      * The pointer \a coeffs must reference the four coefficients of Quaternion in the following order:
       * \code *coeffs == {x, y, z, w} \endcode
       *
       * If the template parameter _Options is set to #Aligned, then the pointer coeffs must be aligned. */
@@ -371,9 +374,9 @@ template<typename _Scalar, int _Options>
 class Map<Quaternion<_Scalar>, _Options >
   : public QuaternionBase<Map<Quaternion<_Scalar>, _Options> >
 {
+  public:
     typedef QuaternionBase<Map<Quaternion<_Scalar>, _Options> > Base;
 
-  public:
     typedef _Scalar Scalar;
     typedef typename internal::traits<Map>::Coefficients Coefficients;
     EIGEN_INHERIT_ASSIGNMENT_EQUAL_OPERATOR(Map)
@@ -464,7 +467,7 @@ QuaternionBase<Derived>::_transformVector(Vector3 v) const
     // Note that this algorithm comes from the optimization by hand
     // of the conversion to a Matrix followed by a Matrix/Vector product.
     // It appears to be much faster than the common algorithm found
-    // in the litterature (30 versus 39 flops). It also requires two
+    // in the literature (30 versus 39 flops). It also requires two
     // Vector3 as temporaries.
     Vector3 uv = this->vec().cross(v);
     uv += uv;
@@ -667,10 +670,10 @@ QuaternionBase<Derived>::angularDistance(const QuaternionBase<OtherDerived>& oth
 {
   using std::acos;
   using std::abs;
-  double d = abs(this->dot(other));
-  if (d>=1.0)
+  Scalar d = abs(this->dot(other));
+  if (d>=Scalar(1))
     return Scalar(0);
-  return static_cast<Scalar>(2 * acos(d));
+  return Scalar(2) * acos(d);
 }
 
  
diff --git a/Eigen/src/Geometry/Scaling.h b/Eigen/src/Geometry/Scaling.h
index 1c25f36fe..023fba2ee 100644
--- a/Eigen/src/Geometry/Scaling.h
+++ b/Eigen/src/Geometry/Scaling.h
@@ -62,10 +62,10 @@ public:
   template<int Dim, int Mode, int Options>
   inline Transform<Scalar,Dim,(int(Mode)==int(Isometry)?Affine:Mode)> operator* (const Transform<Scalar,Dim, Mode, Options>& t) const
   {
-   Transform<Scalar,Dim,(int(Mode)==int(Isometry)?Affine:Mode)> res = t;
-   res.prescale(factor());
-   return res;
-}
+    Transform<Scalar,Dim,(int(Mode)==int(Isometry)?Affine:Mode)> res = t;
+    res.prescale(factor());
+    return res;
+  }
 
   /** Concatenates a uniform scaling and a linear transformation matrix */
   // TODO returns an expression
diff --git a/Eigen/src/Geometry/Transform.h b/Eigen/src/Geometry/Transform.h
index 0a5012cfe..f40644011 100644
--- a/Eigen/src/Geometry/Transform.h
+++ b/Eigen/src/Geometry/Transform.h
@@ -530,9 +530,9 @@ public:
 
   inline Transform& operator=(const UniformScaling<Scalar>& t);
   inline Transform& operator*=(const UniformScaling<Scalar>& s) { return scale(s.factor()); }
-  inline Transform<Scalar,Dim,(int(Mode)==int(Isometry)?Affine:Mode)> operator*(const UniformScaling<Scalar>& s) const
+  inline TransformTimeDiagonalReturnType operator*(const UniformScaling<Scalar>& s) const
   {
-    Transform<Scalar,Dim,(int(Mode)==int(Isometry)?Affine:Mode),Options> res = *this;
+    TransformTimeDiagonalReturnType res = *this;
     res.scale(s.factor());
     return res;
   }
diff --git a/Eigen/src/PaStiXSupport/PaStiXSupport.h b/Eigen/src/PaStiXSupport/PaStiXSupport.h
index a955287d1..8a546dc2f 100644
--- a/Eigen/src/PaStiXSupport/PaStiXSupport.h
+++ b/Eigen/src/PaStiXSupport/PaStiXSupport.h
@@ -12,6 +12,14 @@
 
 namespace Eigen { 
 
+#if defined(DCOMPLEX)
+  #define PASTIX_COMPLEX  COMPLEX
+  #define PASTIX_DCOMPLEX DCOMPLEX
+#else
+  #define PASTIX_COMPLEX  std::complex<float>
+  #define PASTIX_DCOMPLEX std::complex<double>
+#endif
+
 /** \ingroup PaStiXSupport_Module
   * \brief Interface to the PaStix solver
   * 
@@ -74,14 +82,14 @@ namespace internal
   {
     if (n == 0) { ptr = NULL; idx = NULL; vals = NULL; }
     if (nbrhs == 0) {x = NULL; nbrhs=1;}
-    c_pastix(pastix_data, pastix_comm, n, ptr, idx, reinterpret_cast<COMPLEX*>(vals), perm, invp, reinterpret_cast<COMPLEX*>(x), nbrhs, iparm, dparm); 
+    c_pastix(pastix_data, pastix_comm, n, ptr, idx, reinterpret_cast<PASTIX_COMPLEX*>(vals), perm, invp, reinterpret_cast<PASTIX_COMPLEX*>(x), nbrhs, iparm, dparm); 
   }
   
   void eigen_pastix(pastix_data_t **pastix_data, int pastix_comm, int n, int *ptr, int *idx, std::complex<double> *vals, int *perm, int * invp, std::complex<double> *x, int nbrhs, int *iparm, double *dparm)
   {
     if (n == 0) { ptr = NULL; idx = NULL; vals = NULL; }
     if (nbrhs == 0) {x = NULL; nbrhs=1;}
-    z_pastix(pastix_data, pastix_comm, n, ptr, idx, reinterpret_cast<DCOMPLEX*>(vals), perm, invp, reinterpret_cast<DCOMPLEX*>(x), nbrhs, iparm, dparm); 
+    z_pastix(pastix_data, pastix_comm, n, ptr, idx, reinterpret_cast<PASTIX_DCOMPLEX*>(vals), perm, invp, reinterpret_cast<PASTIX_DCOMPLEX*>(x), nbrhs, iparm, dparm); 
   }
 
   // Convert the matrix  to Fortran-style Numbering
diff --git a/Eigen/src/QR/ColPivHouseholderQR.h b/Eigen/src/QR/ColPivHouseholderQR.h
index 07126a9f4..4824880f5 100644
--- a/Eigen/src/QR/ColPivHouseholderQR.h
+++ b/Eigen/src/QR/ColPivHouseholderQR.h
@@ -350,7 +350,7 @@ template<typename _MatrixType> class ColPivHouseholderQR
       return m_usePrescribedThreshold ? m_prescribedThreshold
       // this formula comes from experimenting (see "LU precision tuning" thread on the list)
       // and turns out to be identical to Higham's formula used already in LDLt.
-                                      : NumTraits<Scalar>::epsilon() * m_qr.diagonalSize();
+                                      : NumTraits<Scalar>::epsilon() * RealScalar(m_qr.diagonalSize());
     }
 
     /** \returns the number of nonzero pivots in the QR decomposition.
diff --git a/Eigen/src/QR/FullPivHouseholderQR.h b/Eigen/src/QR/FullPivHouseholderQR.h
index 44eaa1b1a..a7b0fc16f 100644
--- a/Eigen/src/QR/FullPivHouseholderQR.h
+++ b/Eigen/src/QR/FullPivHouseholderQR.h
@@ -346,7 +346,7 @@ template<typename _MatrixType> class FullPivHouseholderQR
       return m_usePrescribedThreshold ? m_prescribedThreshold
       // this formula comes from experimenting (see "LU precision tuning" thread on the list)
       // and turns out to be identical to Higham's formula used already in LDLt.
-                                      : NumTraits<Scalar>::epsilon() * m_qr.diagonalSize();
+                                      : NumTraits<Scalar>::epsilon() * RealScalar(m_qr.diagonalSize());
     }
 
     /** \returns the number of nonzero pivots in the QR decomposition.
@@ -417,7 +417,7 @@ FullPivHouseholderQR<MatrixType>& FullPivHouseholderQR<MatrixType>::compute(cons
 
   m_temp.resize(cols);
 
-  m_precision = NumTraits<Scalar>::epsilon() * size;
+  m_precision = NumTraits<Scalar>::epsilon() * RealScalar(size);
 
   m_rows_transpositions.resize(size);
   m_cols_transpositions.resize(size);
diff --git a/Eigen/src/SparseCore/SparseBlock.h b/Eigen/src/SparseCore/SparseBlock.h
index 6f615e250..5b95cc33f 100644
--- a/Eigen/src/SparseCore/SparseBlock.h
+++ b/Eigen/src/SparseCore/SparseBlock.h
@@ -338,7 +338,10 @@ const Block<const Derived,Dynamic,Dynamic,true> SparseMatrixBase<Derived>::inner
 namespace internal {
   
 template< typename XprType, int BlockRows, int BlockCols, bool InnerPanel,
-          bool OuterVector =  (BlockCols==1 && XprType::IsRowMajor) || (BlockRows==1 && !XprType::IsRowMajor)>
+          bool OuterVector =  (BlockCols==1 && XprType::IsRowMajor)
+                               | // FIXME | instead of || to please GCC 4.4.0 stupid warning "suggest parentheses around &&".
+                                 // revert to || as soon as not needed anymore. 
+                              (BlockRows==1 && !XprType::IsRowMajor)>
 class GenericSparseBlockInnerIteratorImpl;
 
 }
diff --git a/bench/btl/CMakeLists.txt b/bench/btl/CMakeLists.txt
index 119b470d9..0ac5c15fc 100644
--- a/bench/btl/CMakeLists.txt
+++ b/bench/btl/CMakeLists.txt
@@ -48,6 +48,12 @@ include_directories(
 #   set(DEFAULT_LIBRARIES ${MKL_LIBRARIES})
 # endif (MKL_FOUND)
 
+find_library(EIGEN_BTL_RT_LIBRARY rt)
+# if we cannot find it easily, then we don't need it!
+if(NOT EIGEN_BTL_RT_LIBRARY)
+  set(EIGEN_BTL_RT_LIBRARY "")
+endif()
+
 MACRO(BTL_ADD_BENCH targetname)
 
   foreach(_current_var ${ARGN})
@@ -70,7 +76,7 @@ MACRO(BTL_ADD_BENCH targetname)
   IF(BUILD_${targetname})
     ADD_EXECUTABLE(${targetname} ${_sources})
     ADD_TEST(${targetname} "${targetname}")
-    target_link_libraries(${targetname} ${DEFAULT_LIBRARIES} rt)
+    target_link_libraries(${targetname} ${DEFAULT_LIBRARIES} ${EIGEN_BTL_RT_LIBRARY})
   ENDIF(BUILD_${targetname})
 
 ENDMACRO(BTL_ADD_BENCH)
diff --git a/bench/btl/generic_bench/bench.hh b/bench/btl/generic_bench/bench.hh
index 005c36395..7b7b951b5 100644
--- a/bench/btl/generic_bench/bench.hh
+++ b/bench/btl/generic_bench/bench.hh
@@ -102,8 +102,8 @@ BTL_DONT_INLINE void bench( int size_min, int size_max, int nb_point )
       // merge the two data
       std::vector<int> newSizes;
       std::vector<double> newFlops;
-      int i=0;
-      int j=0;
+      unsigned int i=0;
+      unsigned int j=0;
       while (i<tab_sizes.size() && j<oldSizes.size())
       {
         if (tab_sizes[i] == oldSizes[j])
diff --git a/bench/btl/generic_bench/btl.hh b/bench/btl/generic_bench/btl.hh
index f1a88ff74..4670f5113 100644
--- a/bench/btl/generic_bench/btl.hh
+++ b/bench/btl/generic_bench/btl.hh
@@ -46,7 +46,7 @@
 
 #if (defined __GNUC__) && (!defined __INTEL_COMPILER) && !defined(__arm__) && !defined(__powerpc__)
 #define BTL_DISABLE_SSE_EXCEPTIONS()  { \
-  int aux; \
+  int aux = 0; \
   asm( \
   "stmxcsr   %[aux]           \n\t" \
   "orl       $32832, %[aux]   \n\t" \
diff --git a/bench/btl/generic_bench/init/init_matrix.hh b/bench/btl/generic_bench/init/init_matrix.hh
index 67cbd2073..6382d30c8 100644
--- a/bench/btl/generic_bench/init/init_matrix.hh
+++ b/bench/btl/generic_bench/init/init_matrix.hh
@@ -29,7 +29,7 @@ BTL_DONT_INLINE void init_row(Vector & X, int size, int row){
 
   X.resize(size);
 
-  for (int j=0;j<X.size();j++){
+  for (unsigned int j=0;j<X.size();j++){
     X[j]=typename Vector::value_type(init_function(row,j));
   }
 }
@@ -42,7 +42,7 @@ BTL_DONT_INLINE void init_row(Vector & X, int size, int row){
 template<double init_function(int,int),class Vector>
 BTL_DONT_INLINE void init_matrix(Vector &  A, int size){
   A.resize(size);
-  for (int row=0; row<A.size() ; row++){
+  for (unsigned int row=0; row<A.size() ; row++){
     init_row<init_function>(A[row],size,row);
   }
 }
@@ -50,11 +50,11 @@ BTL_DONT_INLINE void init_matrix(Vector &  A, int size){
 template<double init_function(int,int),class Matrix>
 BTL_DONT_INLINE void init_matrix_symm(Matrix&  A, int size){
   A.resize(size);
-  for (int row=0; row<A.size() ; row++)
+  for (unsigned int row=0; row<A.size() ; row++)
     A[row].resize(size);
-  for (int row=0; row<A.size() ; row++){
+  for (unsigned int row=0; row<A.size() ; row++){
     A[row][row] = init_function(row,row);
-    for (int col=0; col<row ; col++){
+    for (unsigned int col=0; col<row ; col++){
       double x = init_function(row,col);
       A[row][col] = A[col][row] = x;
     }
diff --git a/bench/btl/generic_bench/init/init_vector.hh b/bench/btl/generic_bench/init/init_vector.hh
index efaf0c92e..518e87dbe 100644
--- a/bench/btl/generic_bench/init/init_vector.hh
+++ b/bench/btl/generic_bench/init/init_vector.hh
@@ -29,7 +29,7 @@ void init_vector(Vector & X, int size){
 
   X.resize(size);
 
-  for (int i=0;i<X.size();i++){
+  for (unsigned int i=0;i<X.size();i++){
     X[i]=typename Vector::value_type(init_function(i));
   }
 }
diff --git a/bench/btl/generic_bench/timers/portable_perf_analyzer.hh b/bench/btl/generic_bench/timers/portable_perf_analyzer.hh
index fc0f3168d..5e579fb49 100644
--- a/bench/btl/generic_bench/timers/portable_perf_analyzer.hh
+++ b/bench/btl/generic_bench/timers/portable_perf_analyzer.hh
@@ -78,7 +78,7 @@ public:
     // time measurement
     action.calculate();
     _chronos.start();
-    for (int ii=0;ii<_nb_calc;ii++)
+    for (unsigned int ii=0;ii<_nb_calc;ii++)
     {
       action.calculate();
     }
diff --git a/bench/btl/generic_bench/timers/portable_timer.hh b/bench/btl/generic_bench/timers/portable_timer.hh
index e6ad309fe..c199811b6 100755
--- a/bench/btl/generic_bench/timers/portable_timer.hh
+++ b/bench/btl/generic_bench/timers/portable_timer.hh
@@ -34,7 +34,7 @@
 //  timer  -------------------------------------------------------------------//
 
 //  A timer object measures CPU time.
-#ifdef _MSC_VER
+#if defined(_MSC_VER)
 
 #define NOMINMAX
 #include <windows.h>
@@ -87,6 +87,48 @@
 
  }; // Portable_Timer
 
+#elif defined(__APPLE__)
+#include <CoreServices/CoreServices.h>
+#include <mach/mach_time.h>
+
+
+class Portable_Timer
+{
+ public:
+
+  Portable_Timer()
+  {
+  }
+
+  void start()
+  {
+    m_start_time = double(mach_absolute_time())*1e-9;;
+
+  }
+
+  void stop()
+  {
+    m_stop_time = double(mach_absolute_time())*1e-9;;
+
+  }
+
+  double elapsed()
+  {
+    return  user_time();
+  }
+
+  double user_time()
+  {
+    return m_stop_time - m_start_time;
+  }
+
+
+private:
+
+  double m_stop_time, m_start_time;
+
+}; // Portable_Timer (Apple)
+
 #else
 
 #include <sys/time.h>
@@ -138,7 +180,7 @@ private:
   int m_clkid;
   double m_stop_time, m_start_time;
 
-}; // Portable_Timer
+}; // Portable_Timer (Linux)
 
 #endif
 
diff --git a/bench/btl/libs/eigen3/eigen3_interface.hh b/bench/btl/libs/eigen3/eigen3_interface.hh
index 31bcc1f93..0c8aa74da 100644
--- a/bench/btl/libs/eigen3/eigen3_interface.hh
+++ b/bench/btl/libs/eigen3/eigen3_interface.hh
@@ -52,8 +52,8 @@ public :
   static BTL_DONT_INLINE void matrix_from_stl(gene_matrix & A, stl_matrix & A_stl){
     A.resize(A_stl[0].size(), A_stl.size());
 
-    for (int j=0; j<A_stl.size() ; j++){
-      for (int i=0; i<A_stl[j].size() ; i++){
+    for (unsigned int j=0; j<A_stl.size() ; j++){
+      for (unsigned int i=0; i<A_stl[j].size() ; i++){
         A.coeffRef(i,j) = A_stl[j][i];
       }
     }
@@ -62,13 +62,13 @@ public :
   static BTL_DONT_INLINE  void vector_from_stl(gene_vector & B, stl_vector & B_stl){
     B.resize(B_stl.size(),1);
 
-    for (int i=0; i<B_stl.size() ; i++){
+    for (unsigned int i=0; i<B_stl.size() ; i++){
       B.coeffRef(i) = B_stl[i];
     }
   }
 
   static BTL_DONT_INLINE  void vector_to_stl(gene_vector & B, stl_vector & B_stl){
-    for (int i=0; i<B_stl.size() ; i++){
+    for (unsigned int i=0; i<B_stl.size() ; i++){
       B_stl[i] = B.coeff(i);
     }
   }
diff --git a/doc/TopicLinearAlgebraDecompositions.dox b/doc/TopicLinearAlgebraDecompositions.dox
index 8649cc27b..77f2c92ab 100644
--- a/doc/TopicLinearAlgebraDecompositions.dox
+++ b/doc/TopicLinearAlgebraDecompositions.dox
@@ -249,7 +249,7 @@ For an introduction on linear solvers and decompositions, check this \link Tutor
   <dt><b>Implicit Multi Threading (MT)</b></dt>
     <dd>Means the algorithm can take advantage of multicore processors via OpenMP. "Implicit" means the algortihm itself is not parallelized, but that it relies on parallelized matrix-matrix product rountines.</dd>
   <dt><b>Explicit Multi Threading (MT)</b></dt>
-    <dd>Means the algorithm is explicitely parallelized to take advantage of multicore processors via OpenMP.</dd>
+    <dd>Means the algorithm is explicitly parallelized to take advantage of multicore processors via OpenMP.</dd>
   <dt><b>Meta-unroller</b></dt>
     <dd>Means the algorithm is automatically and explicitly unrolled for very small fixed size matrices.</dd>
   <dt><b></b></dt>
diff --git a/doc/TopicMultithreading.dox b/doc/TopicMultithreading.dox
index fb944af29..ba5e26290 100644
--- a/doc/TopicMultithreading.dox
+++ b/doc/TopicMultithreading.dox
@@ -39,7 +39,7 @@ int main(int argc, char** argv)
 }
 \endcode
 
-\warning note that all functions generating random matrices are \b not re-entrant nor thread-safe. Those include DenseBase::Random(), and DenseBase::setRandom() despite a call to Eigen::initParallel(). This is because these functions are based on std::rand which is not re-entrant. For thread-safe random generator, we recommend the use of boost::random of c++11 random feature.
+\warning note that all functions generating random matrices are \b not re-entrant nor thread-safe. Those include DenseBase::Random(), and DenseBase::setRandom() despite a call to Eigen::initParallel(). This is because these functions are based on std::rand which is not re-entrant. For thread-safe random generator, we recommend the use of boost::random or c++11 random feature.
 
 In the case your application is parallelized with OpenMP, you might want to disable Eigen's own parallization as detailed in the previous section.
 
diff --git a/doc/snippets/EigenSolver_eigenvectors.cpp b/doc/snippets/EigenSolver_eigenvectors.cpp
index 0fad4dadb..8355f76c9 100644
--- a/doc/snippets/EigenSolver_eigenvectors.cpp
+++ b/doc/snippets/EigenSolver_eigenvectors.cpp
@@ -1,4 +1,4 @@
 MatrixXd ones = MatrixXd::Ones(3,3);
 EigenSolver<MatrixXd> es(ones);
-cout << "The first eigenvector of the 3x3 matrix of ones is:" 
-     << endl << es.eigenvectors().col(1) << endl;
+cout << "The first eigenvector of the 3x3 matrix of ones is:"
+     << endl << es.eigenvectors().col(0) << endl;
diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index e1bff179d..62cbedae7 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -13,11 +13,26 @@ if(NOT EXISTS ${CMAKE_CURRENT_BINARY_DIR}/split_test_helper.h)
   endforeach()
 endif()
 
+# check if we have a Fortran compiler
+include("../cmake/language_support.cmake")
+
+workaround_9220(Fortran EIGEN_Fortran_COMPILER_WORKS)
+
+if(EIGEN_Fortran_COMPILER_WORKS)
+  enable_language(Fortran OPTIONAL)
+  if(NOT CMAKE_Fortran_COMPILER)
+    set(EIGEN_Fortran_COMPILER_WORKS OFF)
+  endif()
+endif()
+
+if(NOT EIGEN_Fortran_COMPILER_WORKS)
+  # search for a default Lapack library to complete Eigen's one
+  find_package(LAPACK)
+endif()
+
 # configure blas/lapack (use Eigen's ones)
-set(BLAS_FOUND TRUE)
-set(LAPACK_FOUND TRUE)
-set(BLAS_LIBRARIES eigen_blas)
-set(LAPACK_LIBRARIES eigen_lapack)
+set(EIGEN_BLAS_LIBRARIES eigen_blas)
+set(EIGEN_LAPACK_LIBRARIES eigen_lapack)
 
 set(EIGEN_TEST_MATRIX_DIR "" CACHE STRING "Enable testing of realword sparse matrices contained in the specified path")
 if(EIGEN_TEST_MATRIX_DIR)
@@ -32,33 +47,33 @@ endif(EIGEN_TEST_MATRIX_DIR)
 set(SPARSE_LIBS " ")
 
 find_package(Cholmod)
-if(CHOLMOD_FOUND AND BLAS_FOUND AND LAPACK_FOUND)
+if(CHOLMOD_FOUND)
   add_definitions("-DEIGEN_CHOLMOD_SUPPORT")
   include_directories(${CHOLMOD_INCLUDES})
-  set(SPARSE_LIBS ${SPARSE_LIBS} ${CHOLMOD_LIBRARIES} ${BLAS_LIBRARIES} ${LAPACK_LIBRARIES})
-  set(CHOLMOD_ALL_LIBS  ${CHOLMOD_LIBRARIES} ${BLAS_LIBRARIES} ${LAPACK_LIBRARIES})
+  set(SPARSE_LIBS ${SPARSE_LIBS} ${CHOLMOD_LIBRARIES} ${EIGEN_BLAS_LIBRARIES} ${EIGEN_LAPACK_LIBRARIES})
+  set(CHOLMOD_ALL_LIBS  ${CHOLMOD_LIBRARIES} ${EIGEN_BLAS_LIBRARIES} ${EIGEN_LAPACK_LIBRARIES})
   ei_add_property(EIGEN_TESTED_BACKENDS "Cholmod, ")
 else()
   ei_add_property(EIGEN_MISSING_BACKENDS "Cholmod, ")
 endif()
 
 find_package(Umfpack)
-if(UMFPACK_FOUND AND BLAS_FOUND)
+if(UMFPACK_FOUND)
   add_definitions("-DEIGEN_UMFPACK_SUPPORT")
   include_directories(${UMFPACK_INCLUDES})
-  set(SPARSE_LIBS ${SPARSE_LIBS} ${UMFPACK_LIBRARIES} ${BLAS_LIBRARIES})
-  set(UMFPACK_ALL_LIBS ${UMFPACK_LIBRARIES} ${BLAS_LIBRARIES})
+  set(SPARSE_LIBS ${SPARSE_LIBS} ${UMFPACK_LIBRARIES} ${EIGEN_BLAS_LIBRARIES})
+  set(UMFPACK_ALL_LIBS ${UMFPACK_LIBRARIES} ${EIGEN_BLAS_LIBRARIES})
   ei_add_property(EIGEN_TESTED_BACKENDS "UmfPack, ")
 else()
   ei_add_property(EIGEN_MISSING_BACKENDS "UmfPack, ")
 endif()
 
 find_package(SuperLU)
-if(SUPERLU_FOUND AND BLAS_FOUND)
+if(SUPERLU_FOUND)
   add_definitions("-DEIGEN_SUPERLU_SUPPORT")
   include_directories(${SUPERLU_INCLUDES})
-  set(SPARSE_LIBS ${SPARSE_LIBS} ${SUPERLU_LIBRARIES} ${BLAS_LIBRARIES})
-  set(SUPERLU_ALL_LIBS ${SUPERLU_LIBRARIES} ${BLAS_LIBRARIES})
+  set(SPARSE_LIBS ${SPARSE_LIBS} ${SUPERLU_LIBRARIES} ${EIGEN_BLAS_LIBRARIES})
+  set(SUPERLU_ALL_LIBS ${SUPERLU_LIBRARIES} ${EIGEN_BLAS_LIBRARIES})
   ei_add_property(EIGEN_TESTED_BACKENDS  "SuperLU, ")
 else()
   ei_add_property(EIGEN_MISSING_BACKENDS  "SuperLU, ")
@@ -68,7 +83,7 @@ endif()
 find_package(Pastix)
 find_package(Scotch)
 find_package(Metis)
-if(PASTIX_FOUND AND BLAS_FOUND)
+if(PASTIX_FOUND)
   add_definitions("-DEIGEN_PASTIX_SUPPORT")
   include_directories(${PASTIX_INCLUDES})
   if(SCOTCH_FOUND)
@@ -80,8 +95,8 @@ if(PASTIX_FOUND AND BLAS_FOUND)
   else(SCOTCH_FOUND)
     ei_add_property(EIGEN_MISSING_BACKENDS  "PaStiX, ")
   endif(SCOTCH_FOUND)
-  set(SPARSE_LIBS ${SPARSE_LIBS} ${PASTIX_LIBRARIES} ${ORDERING_LIBRARIES} ${BLAS_LIBRARIES})
-  set(PASTIX_ALL_LIBS ${PASTIX_LIBRARIES} ${BLAS_LIBRARIES})
+  set(SPARSE_LIBS ${SPARSE_LIBS} ${PASTIX_LIBRARIES} ${ORDERING_LIBRARIES} ${EIGEN_BLAS_LIBRARIES})
+  set(PASTIX_ALL_LIBS ${PASTIX_LIBRARIES} ${EIGEN_BLAS_LIBRARIES})
   ei_add_property(EIGEN_TESTED_BACKENDS  "PaStiX, ")
 else()
   ei_add_property(EIGEN_MISSING_BACKENDS  "PaStiX, ")
@@ -96,16 +111,14 @@ else()
 endif()
 
 find_package(SPQR)
-if(SPQR_FOUND AND BLAS_FOUND AND LAPACK_FOUND)
-  if(CHOLMOD_FOUND)
-    add_definitions("-DEIGEN_SPQR_SUPPORT")
-    include_directories(${SPQR_INCLUDES})
-    set(SPQR_ALL_LIBS ${SPQR_LIBRARIES} ${CHOLMOD_LIBRARIES} ${LAPACK_LIBRARIES} ${BLAS_LIBRARIES})
-    set(SPARSE_LIBS ${SPARSE_LIBS} ${SPQR_ALL_LIBS})
-    ei_add_property(EIGEN_TESTED_BACKENDS "SPQR, ")
-  else(CHOLMOD_FOUND)
-    ei_add_property(EIGEN_MISSING_BACKENDS "SPQR, ")
-  endif(CHOLMOD_FOUND)
+if(SPQR_FOUND AND CHOLMOD_FOUND AND (EIGEN_Fortran_COMPILER_WORKS OR LAPACK_FOUND) )
+  add_definitions("-DEIGEN_SPQR_SUPPORT")
+  include_directories(${SPQR_INCLUDES})
+  set(SPQR_ALL_LIBS ${SPQR_LIBRARIES} ${CHOLMOD_LIBRARIES} ${EIGEN_LAPACK_LIBRARIES} ${EIGEN_BLAS_LIBRARIES} ${LAPACK_LIBRARIES})
+  set(SPARSE_LIBS ${SPARSE_LIBS} ${SPQR_ALL_LIBS})
+  ei_add_property(EIGEN_TESTED_BACKENDS "SPQR, ")
+else()
+  ei_add_property(EIGEN_MISSING_BACKENDS "SPQR, ")
 endif()
 
 option(EIGEN_TEST_NOQT "Disable Qt support in unit tests" OFF)
diff --git a/test/block.cpp b/test/block.cpp
index 189fa5aba..9ed5d7bc5 100644
--- a/test/block.cpp
+++ b/test/block.cpp
@@ -10,6 +10,26 @@
 #define EIGEN_NO_STATIC_ASSERT // otherwise we fail at compile time on unused paths
 #include "main.h"
 
+template<typename MatrixType, typename Index, typename Scalar>
+typename Eigen::internal::enable_if<!NumTraits<typename MatrixType::Scalar>::IsComplex,typename MatrixType::Scalar>::type
+block_real_only(const MatrixType &m1, Index r1, Index r2, Index c1, Index c2, const Scalar& s1) {
+  // check cwise-Functions:
+  VERIFY_IS_APPROX(m1.row(r1).cwiseMax(s1), m1.cwiseMax(s1).row(r1));
+  VERIFY_IS_APPROX(m1.col(c1).cwiseMin(s1), m1.cwiseMin(s1).col(c1));
+
+  VERIFY_IS_APPROX(m1.block(r1,c1,r2-r1+1,c2-c1+1).cwiseMin(s1), m1.cwiseMin(s1).block(r1,c1,r2-r1+1,c2-c1+1));
+  VERIFY_IS_APPROX(m1.block(r1,c1,r2-r1+1,c2-c1+1).cwiseMax(s1), m1.cwiseMax(s1).block(r1,c1,r2-r1+1,c2-c1+1));
+  
+  return Scalar(0);
+}
+
+template<typename MatrixType, typename Index, typename Scalar>
+typename Eigen::internal::enable_if<NumTraits<typename MatrixType::Scalar>::IsComplex,typename MatrixType::Scalar>::type
+block_real_only(const MatrixType &, Index, Index, Index, Index, const Scalar&) {
+  return Scalar(0);
+}
+
+
 template<typename MatrixType> void block(const MatrixType& m)
 {
   typedef typename MatrixType::Index Index;
@@ -37,6 +57,8 @@ template<typename MatrixType> void block(const MatrixType& m)
   Index c1 = internal::random<Index>(0,cols-1);
   Index c2 = internal::random<Index>(c1,cols-1);
 
+  block_real_only(m1, r1, r2, c1, c1, s1);
+
   //check row() and col()
   VERIFY_IS_EQUAL(m1.col(c1).transpose(), m1.transpose().row(c1));
   //check operator(), both constant and non-constant, on row() and col()
@@ -51,7 +73,8 @@ template<typename MatrixType> void block(const MatrixType& m)
   VERIFY_IS_APPROX(m1.col(c1), m1_copy.col(c1) + s1 * m1_copy.col(c2));
   m1.col(c1).col(0) += s1 * m1_copy.col(c2);
   VERIFY_IS_APPROX(m1.col(c1), m1_copy.col(c1) + Scalar(2) * s1 * m1_copy.col(c2));
-
+  
+  
   //check block()
   Matrix<Scalar,Dynamic,Dynamic> b1(1,1); b1(0,0) = m1(r1,c1);
 
diff --git a/test/cholesky.cpp b/test/cholesky.cpp
index b980dc572..d4d90e467 100644
--- a/test/cholesky.cpp
+++ b/test/cholesky.cpp
@@ -179,6 +179,38 @@ template<typename MatrixType> void cholesky(const MatrixType& m)
     // restore
     if(sign == -1)
       symm = -symm;
+    
+    // check matrices coming from linear constraints with Lagrange multipliers
+    if(rows>=3)
+    {
+      SquareMatrixType A = symm;
+      int c = internal::random<int>(0,rows-2);
+      A.bottomRightCorner(c,c).setZero();
+      // Make sure a solution exists:
+      vecX.setRandom();
+      vecB = A * vecX;
+      vecX.setZero();
+      ldltlo.compute(A);
+      VERIFY_IS_APPROX(A, ldltlo.reconstructedMatrix());
+      vecX = ldltlo.solve(vecB);
+      VERIFY_IS_APPROX(A * vecX, vecB);
+    }
+    
+    // check non-full rank matrices
+    if(rows>=3)
+    {
+      int r = internal::random<int>(1,rows-1);
+      Matrix<Scalar,Dynamic,Dynamic> a = Matrix<Scalar,Dynamic,Dynamic>::Random(rows,r);
+      SquareMatrixType A = a * a.adjoint();
+      // Make sure a solution exists:
+      vecX.setRandom();
+      vecB = A * vecX;
+      vecX.setZero();
+      ldltlo.compute(A);
+      VERIFY_IS_APPROX(A, ldltlo.reconstructedMatrix());
+      vecX = ldltlo.solve(vecB);
+      VERIFY_IS_APPROX(A * vecX, vecB);
+    }
   }
 
   // update/downdate
diff --git a/test/ref.cpp b/test/ref.cpp
index f639d900b..19e81549c 100644
--- a/test/ref.cpp
+++ b/test/ref.cpp
@@ -154,59 +154,79 @@ template<typename PlainObjectType> void check_const_correctness(const PlainObjec
   VERIFY( !(Ref<ConstPlainObjectType, Aligned>::Flags & LvalueBit) );
 }
 
-EIGEN_DONT_INLINE void call_ref_1(Ref<VectorXf> ) { }
-EIGEN_DONT_INLINE void call_ref_2(const Ref<const VectorXf>& ) { }
-EIGEN_DONT_INLINE void call_ref_3(Ref<VectorXf,0,InnerStride<> > ) { }
-EIGEN_DONT_INLINE void call_ref_4(const Ref<const VectorXf,0,InnerStride<> >& ) { }
-EIGEN_DONT_INLINE void call_ref_5(Ref<MatrixXf,0,OuterStride<> > ) { }
-EIGEN_DONT_INLINE void call_ref_6(const Ref<const MatrixXf,0,OuterStride<> >& ) { }
+template<typename B>
+EIGEN_DONT_INLINE void call_ref_1(Ref<VectorXf> a, const B &b) { VERIFY_IS_EQUAL(a,b); }
+template<typename B>
+EIGEN_DONT_INLINE void call_ref_2(const Ref<const VectorXf>& a, const B &b) { VERIFY_IS_EQUAL(a,b); }
+template<typename B>
+EIGEN_DONT_INLINE void call_ref_3(Ref<VectorXf,0,InnerStride<> > a, const B &b) { VERIFY_IS_EQUAL(a,b); }
+template<typename B>
+EIGEN_DONT_INLINE void call_ref_4(const Ref<const VectorXf,0,InnerStride<> >& a, const B &b) { VERIFY_IS_EQUAL(a,b); }
+template<typename B>
+EIGEN_DONT_INLINE void call_ref_5(Ref<MatrixXf,0,OuterStride<> > a, const B &b) { VERIFY_IS_EQUAL(a,b); }
+template<typename B>
+EIGEN_DONT_INLINE void call_ref_6(const Ref<const MatrixXf,0,OuterStride<> >& a, const B &b) { VERIFY_IS_EQUAL(a,b); }
+template<typename B>
+EIGEN_DONT_INLINE void call_ref_7(Ref<Matrix<float,Dynamic,3> > a, const B &b) { VERIFY_IS_EQUAL(a,b); }
 
 void call_ref()
 {
-  VectorXcf ca(10);
-  VectorXf a(10);
+  VectorXcf ca  = VectorXcf::Random(10);
+  VectorXf a    = VectorXf::Random(10);
+  RowVectorXf b = RowVectorXf::Random(10);
+  MatrixXf A    = MatrixXf::Random(10,10);
+  RowVector3f c = RowVector3f::Random();
   const VectorXf& ac(a);
   VectorBlock<VectorXf> ab(a,0,3);
-  MatrixXf A(10,10);
   const VectorBlock<VectorXf> abc(a,0,3);
+  
 
-  VERIFY_EVALUATION_COUNT( call_ref_1(a), 0);
-  //call_ref_1(ac);           // does not compile because ac is const
-  VERIFY_EVALUATION_COUNT( call_ref_1(ab), 0);
-  VERIFY_EVALUATION_COUNT( call_ref_1(a.head(4)), 0);
-  VERIFY_EVALUATION_COUNT( call_ref_1(abc), 0);
-  VERIFY_EVALUATION_COUNT( call_ref_1(A.col(3)), 0);
-  // call_ref_1(A.row(3));    // does not compile because innerstride!=1
-  VERIFY_EVALUATION_COUNT( call_ref_3(A.row(3)), 0);
-  VERIFY_EVALUATION_COUNT( call_ref_4(A.row(3)), 0);
-  //call_ref_1(a+a);          // does not compile for obvious reason
+  VERIFY_EVALUATION_COUNT( call_ref_1(a,a), 0);
+  VERIFY_EVALUATION_COUNT( call_ref_1(b,b.transpose()), 0);
+//   call_ref_1(ac);           // does not compile because ac is const
+  VERIFY_EVALUATION_COUNT( call_ref_1(ab,ab), 0);
+  VERIFY_EVALUATION_COUNT( call_ref_1(a.head(4),a.head(4)), 0);
+  VERIFY_EVALUATION_COUNT( call_ref_1(abc,abc), 0);
+  VERIFY_EVALUATION_COUNT( call_ref_1(A.col(3),A.col(3)), 0);
+//   call_ref_1(A.row(3));    // does not compile because innerstride!=1
+  VERIFY_EVALUATION_COUNT( call_ref_3(A.row(3),A.row(3).transpose()), 0);
+  VERIFY_EVALUATION_COUNT( call_ref_4(A.row(3),A.row(3).transpose()), 0);
+//   call_ref_1(a+a);          // does not compile for obvious reason
 
-  VERIFY_EVALUATION_COUNT( call_ref_2(A*A.col(1)), 1);     // evaluated into a temp
-  VERIFY_EVALUATION_COUNT( call_ref_2(ac.head(5)), 0);
-  VERIFY_EVALUATION_COUNT( call_ref_2(ac), 0);
-  VERIFY_EVALUATION_COUNT( call_ref_2(a), 0);
-  VERIFY_EVALUATION_COUNT( call_ref_2(ab), 0);
-  VERIFY_EVALUATION_COUNT( call_ref_2(a.head(4)), 0);
-  VERIFY_EVALUATION_COUNT( call_ref_2(a+a), 1);            // evaluated into a temp
-  VERIFY_EVALUATION_COUNT( call_ref_2(ca.imag()), 1);      // evaluated into a temp
+  MatrixXf tmp = A*A.col(1);
+  VERIFY_EVALUATION_COUNT( call_ref_2(A*A.col(1), tmp), 1);     // evaluated into a temp
+  VERIFY_EVALUATION_COUNT( call_ref_2(ac.head(5),ac.head(5)), 0);
+  VERIFY_EVALUATION_COUNT( call_ref_2(ac,ac), 0);
+  VERIFY_EVALUATION_COUNT( call_ref_2(a,a), 0);
+  VERIFY_EVALUATION_COUNT( call_ref_2(ab,ab), 0);
+  VERIFY_EVALUATION_COUNT( call_ref_2(a.head(4),a.head(4)), 0);
+  tmp = a+a;
+  VERIFY_EVALUATION_COUNT( call_ref_2(a+a,tmp), 1);            // evaluated into a temp
+  VERIFY_EVALUATION_COUNT( call_ref_2(ca.imag(),ca.imag()), 1);      // evaluated into a temp
 
-  VERIFY_EVALUATION_COUNT( call_ref_4(ac.head(5)), 0);
-  VERIFY_EVALUATION_COUNT( call_ref_4(a+a), 1);           // evaluated into a temp
-  VERIFY_EVALUATION_COUNT( call_ref_4(ca.imag()), 0);
+  VERIFY_EVALUATION_COUNT( call_ref_4(ac.head(5),ac.head(5)), 0);
+  tmp = a+a;
+  VERIFY_EVALUATION_COUNT( call_ref_4(a+a,tmp), 1);           // evaluated into a temp
+  VERIFY_EVALUATION_COUNT( call_ref_4(ca.imag(),ca.imag()), 0);
 
-  VERIFY_EVALUATION_COUNT( call_ref_5(a), 0);
-  VERIFY_EVALUATION_COUNT( call_ref_5(a.head(3)), 0);
-  VERIFY_EVALUATION_COUNT( call_ref_5(A), 0);
-  // call_ref_5(A.transpose());   // does not compile
-  VERIFY_EVALUATION_COUNT( call_ref_5(A.block(1,1,2,2)), 0);
+  VERIFY_EVALUATION_COUNT( call_ref_5(a,a), 0);
+  VERIFY_EVALUATION_COUNT( call_ref_5(a.head(3),a.head(3)), 0);
+  VERIFY_EVALUATION_COUNT( call_ref_5(A,A), 0);
+//   call_ref_5(A.transpose());   // does not compile
+  VERIFY_EVALUATION_COUNT( call_ref_5(A.block(1,1,2,2),A.block(1,1,2,2)), 0);
+  VERIFY_EVALUATION_COUNT( call_ref_5(b,b), 0);             // storage order do not match, but this is a degenerate case that should work
+  VERIFY_EVALUATION_COUNT( call_ref_5(a.row(3),a.row(3)), 0);
 
-  VERIFY_EVALUATION_COUNT( call_ref_6(a), 0);
-  VERIFY_EVALUATION_COUNT( call_ref_6(a.head(3)), 0);
-  VERIFY_EVALUATION_COUNT( call_ref_6(A.row(3)), 1);           // evaluated into a temp thouth it could be avoided by viewing it as a 1xn matrix
-  VERIFY_EVALUATION_COUNT( call_ref_6(A+A), 1);                // evaluated into a temp
-  VERIFY_EVALUATION_COUNT( call_ref_6(A), 0);
-  VERIFY_EVALUATION_COUNT( call_ref_6(A.transpose()), 1);      // evaluated into a temp because the storage orders do not match
-  VERIFY_EVALUATION_COUNT( call_ref_6(A.block(1,1,2,2)), 0);
+  VERIFY_EVALUATION_COUNT( call_ref_6(a,a), 0);
+  VERIFY_EVALUATION_COUNT( call_ref_6(a.head(3),a.head(3)), 0);
+  VERIFY_EVALUATION_COUNT( call_ref_6(A.row(3),A.row(3)), 1);           // evaluated into a temp thouth it could be avoided by viewing it as a 1xn matrix
+  tmp = A+A;
+  VERIFY_EVALUATION_COUNT( call_ref_6(A+A,tmp), 1);                // evaluated into a temp
+  VERIFY_EVALUATION_COUNT( call_ref_6(A,A), 0);
+  VERIFY_EVALUATION_COUNT( call_ref_6(A.transpose(),A.transpose()), 1);      // evaluated into a temp because the storage orders do not match
+  VERIFY_EVALUATION_COUNT( call_ref_6(A.block(1,1,2,2),A.block(1,1,2,2)), 0);
+  
+  VERIFY_EVALUATION_COUNT( call_ref_7(c,c), 0);
 }
 
 void test_ref()
diff --git a/test/sizeof.cpp b/test/sizeof.cpp
index d9ad35620..7044d2062 100644
--- a/test/sizeof.cpp
+++ b/test/sizeof.cpp
@@ -21,6 +21,8 @@ template<typename MatrixType> void verifySizeOf(const MatrixType&)
 void test_sizeof()
 {
   CALL_SUBTEST(verifySizeOf(Matrix<float, 1, 1>()) );
+  CALL_SUBTEST(verifySizeOf(Vector2d()) );
+  CALL_SUBTEST(verifySizeOf(Vector4f()) );
   CALL_SUBTEST(verifySizeOf(Matrix4d()) );
   CALL_SUBTEST(verifySizeOf(Matrix<double, 4, 2>()) );
   CALL_SUBTEST(verifySizeOf(Matrix<bool, 7, 5>()) );
diff --git a/unsupported/Eigen/src/IterativeSolvers/MINRES.h b/unsupported/Eigen/src/IterativeSolvers/MINRES.h
index 0e56342a8..98f9ecc17 100644
--- a/unsupported/Eigen/src/IterativeSolvers/MINRES.h
+++ b/unsupported/Eigen/src/IterativeSolvers/MINRES.h
@@ -37,22 +37,31 @@ namespace Eigen {
             typedef typename Dest::Scalar Scalar;
             typedef Matrix<Scalar,Dynamic,1> VectorType;
 
+            // Check for zero rhs
+            const RealScalar rhsNorm2(rhs.squaredNorm());
+            if(rhsNorm2 == 0)
+            {
+                x.setZero();
+                iters = 0;
+                tol_error = 0;
+                return;
+            }
+            
             // initialize
             const int maxIters(iters);  // initialize maxIters to iters
             const int N(mat.cols());    // the size of the matrix
-            const RealScalar rhsNorm2(rhs.squaredNorm());
             const RealScalar threshold2(tol_error*tol_error*rhsNorm2); // convergence threshold (compared to residualNorm2)
             
             // Initialize preconditioned Lanczos
-//            VectorType v_old(N); // will be initialized inside loop
+            VectorType v_old(N); // will be initialized inside loop
             VectorType v( VectorType::Zero(N) ); //initialize v
             VectorType v_new(rhs-mat*x); //initialize v_new
             RealScalar residualNorm2(v_new.squaredNorm());
-//            VectorType w(N); // will be initialized inside loop
+            VectorType w(N); // will be initialized inside loop
             VectorType w_new(precond.solve(v_new)); // initialize w_new
 //            RealScalar beta; // will be initialized inside loop
             RealScalar beta_new2(v_new.dot(w_new));
-            eigen_assert(beta_new2 >= 0 && "PRECONDITIONER IS NOT POSITIVE DEFINITE");
+            eigen_assert(beta_new2 >= 0.0 && "PRECONDITIONER IS NOT POSITIVE DEFINITE");
             RealScalar beta_new(sqrt(beta_new2));
             const RealScalar beta_one(beta_new);
             v_new /= beta_new;
@@ -62,14 +71,14 @@ namespace Eigen {
             RealScalar c_old(1.0);
             RealScalar s(0.0); // the sine of the Givens rotation
             RealScalar s_old(0.0); // the sine of the Givens rotation
-//            VectorType p_oold(N); // will be initialized in loop
+            VectorType p_oold(N); // will be initialized in loop
             VectorType p_old(VectorType::Zero(N)); // initialize p_old=0
             VectorType p(p_old); // initialize p=0
             RealScalar eta(1.0);
                         
             iters = 0; // reset iters
-            while ( iters < maxIters ){
-                
+            while ( iters < maxIters )
+            {
                 // Preconditioned Lanczos
                 /* Note that there are 4 variants on the Lanczos algorithm. These are
                  * described in Paige, C. C. (1972). Computational variants of
@@ -81,17 +90,17 @@ namespace Eigen {
                  * A. Greenbaum, Iterative Methods for Solving Linear Systems, SIAM (1987).
                  */
                 const RealScalar beta(beta_new);
-//                v_old = v; // update: at first time step, this makes v_old = 0 so value of beta doesn't matter
-                const VectorType v_old(v); // NOT SURE IF CREATING v_old EVERY ITERATION IS EFFICIENT
+                v_old = v; // update: at first time step, this makes v_old = 0 so value of beta doesn't matter
+//                const VectorType v_old(v); // NOT SURE IF CREATING v_old EVERY ITERATION IS EFFICIENT
                 v = v_new; // update
-//                w = w_new; // update
-                const VectorType w(w_new); // NOT SURE IF CREATING w EVERY ITERATION IS EFFICIENT
+                w = w_new; // update
+//                const VectorType w(w_new); // NOT SURE IF CREATING w EVERY ITERATION IS EFFICIENT
                 v_new.noalias() = mat*w - beta*v_old; // compute v_new
                 const RealScalar alpha = v_new.dot(w);
                 v_new -= alpha*v; // overwrite v_new
                 w_new = precond.solve(v_new); // overwrite w_new
                 beta_new2 = v_new.dot(w_new); // compute beta_new
-                eigen_assert(beta_new2 >= 0 && "PRECONDITIONER IS NOT POSITIVE DEFINITE");
+                eigen_assert(beta_new2 >= 0.0 && "PRECONDITIONER IS NOT POSITIVE DEFINITE");
                 beta_new = sqrt(beta_new2); // compute beta_new
                 v_new /= beta_new; // overwrite v_new for next iteration
                 w_new /= beta_new; // overwrite w_new for next iteration
@@ -107,28 +116,34 @@ namespace Eigen {
                 s=beta_new/r1; // new sine
                 
                 // Update solution
-//                p_oold = p_old;
-                const VectorType p_oold(p_old); // NOT SURE IF CREATING p_oold EVERY ITERATION IS EFFICIENT
+                p_oold = p_old;
+//                const VectorType p_oold(p_old); // NOT SURE IF CREATING p_oold EVERY ITERATION IS EFFICIENT
                 p_old = p;
                 p.noalias()=(w-r2*p_old-r3*p_oold) /r1; // IS NOALIAS REQUIRED?
                 x += beta_one*c*eta*p;
+                
+                /* Update the squared residual. Note that this is the estimated residual.
+                The real residual |Ax-b|^2 may be slightly larger */
                 residualNorm2 *= s*s;
                 
-                if ( residualNorm2 < threshold2){
+                if ( residualNorm2 < threshold2)
+                {
                     break;
                 }
                 
                 eta=-s*eta; // update eta
                 iters++; // increment iteration number (for output purposes)
             }
-            tol_error = std::sqrt(residualNorm2 / rhsNorm2); // return error. Note that this is the estimated error. The real error |Ax-b|/|b| may be slightly larger 
+            
+            /* Compute error. Note that this is the estimated error. The real 
+             error |Ax-b|/|b| may be slightly larger */
+            tol_error = std::sqrt(residualNorm2 / rhsNorm2);
         }
         
     }
     
     template< typename _MatrixType, int _UpLo=Lower,
     typename _Preconditioner = IdentityPreconditioner>
-//    typename _Preconditioner = IdentityPreconditioner<typename _MatrixType::Scalar> > // preconditioner must be positive definite
     class MINRES;
     
     namespace internal {
diff --git a/unsupported/Eigen/src/Splines/Spline.h b/unsupported/Eigen/src/Splines/Spline.h
index 771f10432..1b47992d6 100644
--- a/unsupported/Eigen/src/Splines/Spline.h
+++ b/unsupported/Eigen/src/Splines/Spline.h
@@ -57,7 +57,7 @@ namespace Eigen
     **/
     Spline() 
     : m_knots(1, (Degree==Dynamic ? 2 : 2*Degree+2))
-    , m_ctrls(ControlPointVectorType::Zero(2,(Degree==Dynamic ? 1 : Degree+1))) 
+    , m_ctrls(ControlPointVectorType::Zero(Dimension,(Degree==Dynamic ? 1 : Degree+1))) 
     {
       // in theory this code can go to the initializer list but it will get pretty
       // much unreadable ...
diff --git a/unsupported/test/minres.cpp b/unsupported/test/minres.cpp
index fd12da548..81b762c37 100644
--- a/unsupported/test/minres.cpp
+++ b/unsupported/test/minres.cpp
@@ -1,8 +1,8 @@
 // This file is part of Eigen, a lightweight C++ template library
 // for linear algebra.
 //
-// Copyright (C) 2011 Gael Guennebaud <g.gael@free.fr>
 // Copyright (C) 2012 Giacomo Po <gpo@ucla.edu>
+// Copyright (C) 2011 Gael Guennebaud <g.gael@free.fr>
 //
 // This Source Code Form is subject to the terms of the Mozilla
 // Public License v. 2.0. If a copy of the MPL was not distributed
@@ -14,19 +14,29 @@
 
 template<typename T> void test_minres_T()
 {
-  MINRES<SparseMatrix<T>, Lower, DiagonalPreconditioner<T> > minres_colmajor_diag;
-  MINRES<SparseMatrix<T>, Lower, IdentityPreconditioner    > minres_colmajor_I;
-//  MINRES<SparseMatrix<T>, Lower, IncompleteLUT<T> >           minres_colmajor_ilut;
-  //minres<SparseMatrix<T>, SSORPreconditioner<T> >     minres_colmajor_ssor;
+  // Identity preconditioner
+  MINRES<SparseMatrix<T>, Lower, IdentityPreconditioner    > minres_colmajor_lower_I;
+  MINRES<SparseMatrix<T>, Upper, IdentityPreconditioner    > minres_colmajor_upper_I;
+
+  // Diagonal preconditioner
+  MINRES<SparseMatrix<T>, Lower, DiagonalPreconditioner<T> > minres_colmajor_lower_diag;
+  MINRES<SparseMatrix<T>, Upper, DiagonalPreconditioner<T> > minres_colmajor_upper_diag;
+  
+  // call tests for SPD matrix
+  CALL_SUBTEST( check_sparse_spd_solving(minres_colmajor_lower_I) );
+  CALL_SUBTEST( check_sparse_spd_solving(minres_colmajor_upper_I) );
+    
+  CALL_SUBTEST( check_sparse_spd_solving(minres_colmajor_lower_diag)  );
+  CALL_SUBTEST( check_sparse_spd_solving(minres_colmajor_upper_diag)  );
+    
+  // TO DO: symmetric semi-definite matrix
+  // TO DO: symmetric indefinite matrix
 
-  CALL_SUBTEST( check_sparse_square_solving(minres_colmajor_diag)  );
-  CALL_SUBTEST( check_sparse_spd_solving(minres_colmajor_I) );
- // CALL_SUBTEST( check_sparse_square_solving(minres_colmajor_ilut)     );
-  //CALL_SUBTEST( check_sparse_square_solving(minres_colmajor_ssor)     );
 }
 
 void test_minres()
 {
   CALL_SUBTEST_1(test_minres_T<double>());
-//  CALL_SUBTEST_2(test_minres_T<std::complex<double> >());
+//  CALL_SUBTEST_2(test_minres_T<std::compex<double> >());
+
 }