Boost release 1.40.0 beta 1 is available from SourceForge: http://sourceforge.net/projects/boost/files/ This release contains no new libraries, but contains numerous bug fixes for existing libraries. Boost source files with types .bz2 and .gz are created with POSIX-style (\n) line endings. Source files with types .7z and .zip are created with Windows-style (\r\n) line endings. The content is otherwise identical. Be sure to download a file with the appropriate line endings for your platform. If you are new to Boost, be sure to read the Getting Started Guide. See www.boost.org There are three known issues with beta 1: * boost/detail/scoped_enum_emulation.hpp, used by Boost.Filesystem, has a name conflict (enum_t) with Unix header rpc/types.h. Fixed in trunk, but not yet merged into the release. * Boost.Python has fixes in trunk not yet merged into to the release. * Boost.Signals has has fixes in trunk not yet merged into to the release. These issues will be resolved for the final 1.40.0 release. Other than these three known issues, please report any problems with the beta on the developers or users mailing lists. Unless unexpected problems arise, the plan is to ship the final 1.40.0 release in a week to ten days. Thanks, --The Boost release team