[boost] Boost.Thread (1.32draft) -- release library not built

Hi All, I have just downloaded the v1.32 draft and built the thread libraries, however it seems as though only the debug static lib has been built. I'm using VC7.1 and am trying to link to "libboost_thread-vc71-mt-s-1_32.lib" which has not been built. The following files were built successfully: - libboost_thread-vc71-mt-sgd-1_32.lib - boost_thread-vc71-mt-gd-1_32.lib - boost_thread-vc71-mt-gd-1_32.dll Is there a specific reason this lib is not being built, or is it that I've missed something somewhat important during the bjam build process? TIA - James.