Hi all, I think I've found a bug in boost::serialization. If I change the order of serialization, one of my pointers does not seem to be correctly serialized. It's hard to explain, so please see my code: http://dl.getdropbox.com/u/416909/serialization_error.cpp and http://dl.getdropbox.com/u/416909/simple_tree.hpp I'm using VS2008. Thanks, Ross