Whenever I try to import an object from one Zope (2.3.0) to another (2.3.1) I get a Error Type: AttributeError Error Value: __basicnew__ and the top of the stack is one of those indecipherable pickled things, which I have no idea how to read or how they might be useful, i.e. -- File /usr/local/Zope/lib/python/ZODB/Connection.py, line 166, in __getitem__ (Info: ('\000\000\000\000\000\0001\030', '((U\036Pro <lots of junk snipped> 0tr\211\001\000\000Qu.')) AttributeError: (see above) I also get this error when I try to fire up the 2.3.1 with a copy of the Data.fs from 2.3.0. Why might this be? Can anyone shed any light onto what __basicnew__ does? And has anyone any pointers to understanding these pickled traceback things? Whenever they occur, I find it's usually due to inconsistencies between the pickled product-related info and the products loaded from the filesystem, but I don't know how to go about debugging it. Cheers, seb