I think that's pretty much on target. I sort of reached my limit of patience in making shared_ptr backward compatible at all. Then I got to borland and I sort of gave up on the hope that the intersection of users of borland and 1.32 shared_ptr serialization would be a null set. If a borland expert wants to spend some time on this - please be my guest. Robert Ramey AlisdairM wrote:

The problem comes because serialization shared_ptr_132.hpp and the 'real' shared_ptr cannot be mixed on this compiler. I suspect this is an issue with using directives inside namespaces in shared_ptr_132, but am investigating further.