Robert, The implementation of xml_woarchive_impl<Archive>::save(const wchar_t * ws) may be found beginning on line 122 of xml_woarchive_impl.ipp. The code serializes the given wide character string twice into the stream, the first time without and the second time with escaping. Compare this with the implementation of save(const std::wstring & ws) a few lines above which correctly serializes the wide character string only once with escaping. Regards, George.