I did something stupid with my serialization code. I blithely changed the names of several polymorphic classes everywhere they appeared in the code, since they had moved out of a class into that class's namespace (e.g. SomeNS::View::Primitive became SomeNS::Primitive). Several months later, I discovered that I could no longer read old binary archives, because I was using Boost.Serialization's BOOST_CLASS_EXPORT() macro, and this macro was now registering the Primtive type with the name-string "Primitive", instead of "View::Primitive", which is how it was saved in the oldest archives. Since there is a 1-1 mapping between name-strings and types, and since most of the Serialization code uses static/global data, I cannot currently support both the archives saved with and the archives saved without the "View::" in the same program. Since I suspect this is not the first time someone has done this, nor the last time someone will do so, is there a way to fix this using the current library? If not, would it be technically possible to add a BOOST_CLASS_EXPORT_ALIAS() macro, or some such? If it is possible, I'm willing to supply the implementation. Zach Laine