I just ported all our code using Boost.Serialization over to 1.33 today and came across similar problems so I thought I'd add some comments as additional data points. In all cases the problems were trivial to fix (making Save() member functions const for example) and only came across a single case of serialising a local variable in our code, the fix there was also relatively trivial, so all in all this didn't cause us much grief at all. The bigger problem I have is with the added included dependancy order (archives must be included before any other serialisation files) which caused a big rearrangment of our headers and was a pain to deal with. Luckily for us these were all internal headers but it just reminds me of the problems with header dependancy that boost\serialisation\shared_ptr.hpp had and that have been happily resolved in this release. This is a much bigger issue for me and something that really should be readdressed. cheers Martin -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.338 / Virus Database: 267.10.15/80 - Release Date: 23/08/2005