Hello, My project builds well with MSVC10 for x86 platform. However, when I tried to build it for x64, I started to get the following strange error: 1>...cpp(42): error C2668: 'boost::bind' : ambiguous call to overloaded function 1> ...\boost\boost/bind/bind_mf_cc.hpp(43): could be 'boost::_bi::bind_t boost::bind(R (__cdecl MyImpl::* )(B1),A1,A2)' <...> 1> ...\boost\boost/bind/bind_mf_cc.hpp(43): or 'boost::_bi::bind_t boost::bind(R (__cdecl MyImpl::* )(B1),A1,A2)' Note that the both variants are actually the same one. The source line that causes the error looks like this: io_service_.post(boost::bind(&MyImpl::func, someSharedPtr)); i.e. boost::bind name is fully qualified. Unfortunately, I can't reproduce this error in a "fresh" trivial project, so I realize that the problem most likely isn't in Bind, but somewhere in my project. The question is what could cause such a behavior? Did anyone encounter such an issue? Thanks.