Hi, I have updated Boost.Thread to make use of Boost.Move with some significant improvements. Up to now the boost/thread/config.hpp file made use of Boost.Move by default. #if ! defined BOOST_THREAD_DONT_USE_MOVE #define BOOST_THREAD_USES_MOVE #endif After the discussion about deprecated features I think that it would be more convenient to don't change the default for the next release and let the users define this macro. There are some tests that need BOOST_THREAD_USES_MOVE. I will either add it explicitly on the test source code or define it when BOOST_THREAD_VERSION==2. What do you think? BTW, unfortunatly I've considered that the preceding Boost.Thread version was 1, while it was 2 (the first been the original one by William Kempf). Should the breaking changes be included using version BOOST_THREAD_VERSION==3? Anthony? Best, Vicente