Hi folks, On the HEAD recently, a bunch of changes were made to the Persistence package. Notably, the Persistence.PersistentMapping module was removed in favor of a Persistence.mapping module. Unfortunately, there are instance pickles lying around in any CMF instance created prior to the changes (DiscussionItem's _container attribute is the one I found) which explicitly refer to Persistence.PersistentMapping.PersistentMapping. This name can no longer be resolved to a class. This breaks b/w compatibility. I "fixed" the issue by adding the following to the Persistence package's __init__.py: sys.modules['Persistence.PersistentMapping'] = sys.modules['Persistence.mapping'] That seems really ugly, though. Is there a better way to fix it? - C