The latest regression results for test_read_write_mutex at http://boost.sourceforge.net/regression-logs/cs-Linux/developer/thread.html report a number of different errors on different compilers, the most common being <quote> Assertion failed: valid_read_lock(m_state), file C:\Users\administrator\main\boost\libs\thread\build\..\src\read_write_mutex.cpp, line 218 </quote> This indicates to me that these regression tests were run without the changes I checked in yesterday afternoon. Is this just because it takes so long to run regression tests that I have to wait for the next run to find out how my changes worked, or is there another reason? Also, the only reason I can tell that the regression tests were run without recent changes is because the changes were significant enough that the assertion in question is no longer anywhere near line 218. Is there any possibility at some point in the future of adding information to the regression log indicating what version of each source file was used to run the tests? I realize that this information isn't directly available to the regression testing tools, but perhaps the build process could be modified to record the cvs version information for each source file it uses (not sure how it would get it) whenever it builds anything, and the information could be incorporated into the regression reports? Mike