[boost] [filesystem] svn trunk broken

gcc-4.1.2 ./boost/filesystem/operations.hpp:1001: error: passing ‘const boost::filesystem::basic_path<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, boost::filesystem::path_traits>’ as ‘this’ argument of ‘boost::filesystem::basic_path<String, Traits>& boost::filesystem::basic_path<String, Traits>::remove_leaf() [with String = std::basic_string<char, std::char_traits<char>, std::allocator<char> >, Traits = boost::filesystem::path_traits]’ discards qualifiers