[Boost-users] [Bind] Placeholder scope

I have just spent several hours digging out a compile problem which turned out to be a conflict between Boost.Bind and Boost.Lambda, which seems to arise because the Boost.Bind placeholders (_1, etc.) are in the global namespace, so if "using namespace boost::lambda;" is in effect the Bind placeholder is used rather than the Lambda placeholder. I wonder why the Bind placeholders are in the global namespace? Thanks, Rob.