in boost/config/detail/suffix.hpp I find this bit of code: // // We can't have a working std::wstreambuf if there is no std::locale: // # if defined(BOOST_NO_STD_LOCALE) && !defined(BOOST_NO_STD_WSTREAMBUF) # define BOOST_NO_STD_WSTREAMBUF # endif and believe it or not. this is now causing me some issues. Is the statement above true? Do we know that wide char streams cannot exist without std::locale being present? Can anyone shed light on this? Robert Ramey