Eigen 2.0.15 has been released on July 16, 2010.
Changes since 2.0.14:
* Fix bug: a bad assert was blocking certain cases of matrix-vector product (depending on storage order).
* Fix LU and QR solve when rank==0, fix LLT when the matrix is purely 0.
* Fix a couple of bugs with QR solving especially with rows>cols.
* Fix bug with custom scalar types that have non-trivial destructor.
* Fix for ICC in SSE code.
* Fix some C++ issues found by Clang (patch by Nick Lewycky).