[boost] <windows.h> policy?

The header date_time/microsec_time_clock.hpp (which is used by the Thread lib) includes <windows.h>. I noticed because a call to std::min() in my own code stopped compiling after I switched a project to compile against the current boost trunk. What is the official policy for including such platform-specific headers? I hope that this is a bug! -- Emil Dotchevski Reverge Studios, Inc. http://www.revergestudios.com/reblog/index.php?n=ReCode