I just applied the following patch to test_bind_tricky.cpp; since boost::bind's placeholders are sometimes inline functions, they can't be passed to const T&. It might be better to have something that at least has a chance to pass. Index: libs/tr1/test/test_bind_tricky.cpp ===================================================== RCS file: /cvsroot/boost/boost/libs/tr1/test/test_bind_tricky.cpp,v retrieving revision 1.2 retrieving revision 1.3 diff -u -r1.2 -r1.3 --- libs/tr1/test/test_bind_tricky.cpp 12 Nov 2005 17:34:36 -0000 1.2 +++ libs/tr1/test/test_bind_tricky.cpp 7 Jul 2006 19:25:00 -0000 1.3 @@ -13,12 +13,12 @@ #include "verify_return.hpp" template <class T> -void check_placeholder(const T&) +void check_placeholder( T ) { T t; T t2(t); (void)t2; - BOOST_STATIC_ASSERT(::std::tr1::is_placeholder<T>::value); + BOOST_STATIC_ASSERT( ::std::tr1::is_placeholder<T>::value > 0 ); }