This also isn't exactly what you are looking for, but I took built your test.cpp on vc7.1 running on windows XP using boost 1.31 (also built with vc7.1 running on windows XP). Both the debug (using boost_thread-vc71-mt-gd-1_31.dll) and the release (using boost_thread-vc71-mt-1_31.dll) builds of test.cpp worked fine. My boost dlls were built with all default settings (except I used the alternate namespace hack for boost::signals since we also use Qt). I don't have a boost 1.31 built on win2k to try.

Perhaps I should add that I am using version 1.31 of boost. I have also discovered that it seems (it might be an illusion, you never know) to work when I compile against boost_thread-vc71-mt-gd-1_31.lib, but not against the release lib boost_thread-vc71-mt-1_31.lib. /Ragnar Ouchterlony

_________________________________________________________________ Overwhelmed by debt? Find out how to ‘Dig Yourself Out of Debt’ from MSN Money. http://special.msn.com/money/0407debt.armx