[Zope] Problem with 2.4.2 installation: RegexObject fails using old Data.fs

When I moved to zope 2.4.2 I copied over my old Data.fs This leads to quite a few errors of the form: 2001-10-26T14:30:08 ERROR(200) ZODB Couldn't load state for '\x00\x00\x00\x00\x00\x00l\x8b' Traceback (innermost last): File /usr/share/Zope-2.4.2-linux2-x86/lib/python/ZODB/Connection.py, line 544, in setstate SystemError: Failed to import class RegexObject from module re I know that this is the new regexp mechanism, but don't know which old product or item may be failing, or how to track down the problem. After the 2.4.2 install I tried the installation Data.fs without difficulties. Any hints are desperately and gratefully needed. Thanks, Greg