Here is short summary of the current status of the serialization library. Its based on tests on my own machine and others. In some cases I'm anticipating results of next tests. Linux - 100 % passing all compilers Except intel 8.0 - problem with serialization some collections - list, map, set, and array. Darwin - 100 * passsing Except - one test of demo fail Windows Mingw - 100 % of all char archives 0 % of wchar_t archives. Apparently mingw doesn't support wchar_t. Itel 100 % all versions Borland - mostly passing - this is the best I can do here VC <= 7.0 - mostly passing - this is the best I can do here VC 7.1 - 100% VC 8.0 - 0% - I don't know the status of this compiler. Library fails to build due to syntax error compiling spirit headers. I'm not prepared to address this. Commeau - 100 % EXCEPT archives which use wide characters. I believe it would be easy to find if I could figure out a way to debug this. Metrowerks CodeWarrior - This is a little confusing. One tester shows 100% success. The best I have is all pass EXCEPT tests which use export facility or wchar_t archives. Another tester has the same result I do. All tests that fail have unexpected linker warnings. I suspect a build issue but have been unable to find it. So that's it I could use help with Intel 8.0 array, list, set and map. Its probably one error in collection loading. Comeau - problems with wchar_t. Very likely related to codecvt facit usage Metrowerks CodeWarrior. Weird linker warnings. Fails for programs which use utf8_codecvt_facet and which use export. Export seems to fail due to an over zealous link time optimizer eliminating what might look like dead code. Robert Ramey