FYI, I'm using clang 3.1 (svn snapshot) just fine with Boost versions 1.44.0 through 1.49.0 (Python, Filesystem, Threads, Graph, and other libraries) and the codebase itself uses quite a few STL containers. I haven't tested 3.0 (older Boosts aren't compiling with GCC 4.7.0, so testing is harder) and 2.8 chokes on Boost.