I just updated (well 7 hours ago also, but did another update now) and am getting the following errors:

C:\Boost Releases\boost\boost\mpl\if.hpp(146) : error C2970: 'boost::mpl::aux::if_impl' : template argument 'C' : invalid use of non-integral-constant static variable 'value' as non-type argument
        C:\Boost Releases\boost\boost\mpl\if.hpp(113) : see declaration of 'boost::mpl::aux::if_impl'
        C:\Boost Releases\boost\boost\mpl\if.hpp(150) : see reference to class template instantiation 'boost::mpl::if_<C,T1,T2>' being compiled
C:\Program Files\Microsoft Visual Studio .NET\Vc7\include\xlocm

I don't know where to begin looking for what's wrong; I didn't even know I was using the mpl stuff.
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