The documentation of boost.threads seems to be built wrong. In several places sentences don't make sense, and words are missing. Some examples are: " Introduction ??? allows C++ programs to execute as multiple, asynchronous, independent threads-of-execution. " " It is possible to write thread-safe implementations of these by using thread specific storage (see boost::thread_specific_ptr), and several C++ compiler vendors do just that. The technique is well-know and is explained in ???. " What's wrong? Bruno