Hi there, There seems to be a problem with my ZCatalog, and it seems to be getting worse as time goes by. When my CatalogPathAware objects unindex themselves, sometimes I get an attribute error like: AttributeError: 'str' object has no attribute 'append' Traceback (innermost last): Module ZPublisher.Publish, line 101, in publish Module ZPublisher.mapply, line 88, in mapply Module ZPublisher.Publish, line 39, in call_object Module Products.FileSystemSite.FSPythonScript, line 104, in __call__ Module Shared.DC.Scripts.Bindings, line 306, in __call__ Module Shared.DC.Scripts.Bindings, line 343, in _bindAndExec Module Products.FileSystemSite.FSPythonScript, line 160, in _exec Module None, line 33, in tab_status_approve - <FSPythonScript at /silva/service_views/Silva/edit/VersionedContent/tab_status_approve used for /silva/service_views/SilvaDocument/edit/VersionedContent/Document> - Line 33 Module Products.Silva.Versioning, line 125, in approve_version Module Products.Silva.Versioning, line 512, in _update_publication_status Module Products.Silva.VersionedContent, line 334, in _unindex_version Module Products.Silva.Version, line 191, in unindex_object Module Products.ZCatalog.ZCatalog, line 558, in uncatalog_object Module Products.ZCatalog.Catalog, line 411, in uncatalogObject Module Products.ZCTextIndex.ZCTextIndex, line 181, in unindex_object Module Products.ZCTextIndex.OkapiIndex, line 68, in unindex_doc Module Products.ZCTextIndex.BaseIndex, line 176, in unindex_doc Module Products.ZCTextIndex.BaseIndex, line 303, in _del_wordinfo Module ZODB.Connection, line 562, in setstate Module ZODB.Connection, line 601, in _set_ghost_state AttributeError: 'str' object has no attribute 'append' In the logfile, the last line of code is shown in the traceback: File "/export1/Zope-2.7.2-0/lib/python/ZODB/Connection.py", line 601, in _set_ghost_state state = unpickler.load() Perhaps this is a ZEO issue. I'm using Zope-2.7.2-0 with ZEO. Both the zeo server and the client are on the same box. The zeo logfile reports no errors when this occurs. Any ideas why this may be happening?