Version 1.30.1 is a bugfix-only update. See http://www.boost.org for details of what has been fixed. Version 1.31.0, due out shortly, will contain some changes to library interfaces (notably the iterator adaptors library) which may break client code. Version 1.30.1 was released in order to deliver non-interface-breaking improvements to existing users of Boost 1.30.0. Note for Boost.Python users: this release is not compatible with Python 2.3. For information on how to obtain a Python 2.3-compatible version of Boost.Python, please see http://www.boost.org/libs/python. -- Dave Abrahams Boost Consulting www.boost-consulting.com