I don't know if this mailing list is the best place to file a bug report (maybe better on the boost-developers mailing list, or on bugzilla if there is one) to get something fixed, but I have a problem with type_traits.
You're in the right place.
I am not using type_traits directly, only through use of the BGL. I got the following error (which was posted in a previous message related to the BGL, before I discovered that the error was in type_traits - sorry!):
I have looked in the file producing the error (multiple defines). It doesn't include a header guard, but the file specifically says that this is intentional. Thus, I am not qualified enough to get a quick fix for my situation, and this is a problem since I really need the CVS version of Boost for my project...
The headers for rank and extent should #undef all those macros after use, but weren't doing so: this will be fixed in cvs very shortly, Thanks for the report, John.