A user got this error trying to edit content. It only happened once, and on second try she was ok. Using Zope 2.7.0: Traceback (innermost last): Module ZPublisher.Publish, line 100, in publish Module ZPublisher.mapply, line 88, in mapply Module ZPublisher.Publish, line 40, in call_object Module Products.CMFFormController.FSControllerPageTemplate, line 81, in __call__ Module Products.CMFFormController.BaseControllerPageTemplate, line 42, in _call Module Shared.DC.Scripts.Bindings, line 306, in __call__ Module Shared.DC.Scripts.Bindings, line 343, in _bindAndExec Module Products.CMFCore.FSPageTemplate, line 191, in _exec Module Products.CMFCore.FSPageTemplate, line 124, in pt_render Module Products.PageTemplates.PageTemplate, line 96, in pt_render - <FSControllerPageTemplate at /saultdiocese/base_edit used for /saultdiocese/DioceseOffice.2004-04-26.0049447933/WorkspaceFolder.2004-04-26.0631977769/Workspace.2004-07-15.1703647729/News.2004-10-13.7108192668/en> Module TAL.TALInterpreter, line 189, in __call__ [ some TALInterpreter lines snipped ] Module TAL.TALInterpreter, line 459, in do_setLocal_tal Module Products.PageTemplates.TALES, line 220, in evaluate Module Products.PageTemplates.ZRPythonExpr, line 47, in __call__ - __traceback_info__: widget.postback and request.get(fieldName, here.session_restore_value(fieldName, value)) or value Module Python expression "widget.postback and request.get(fieldName, here.session_restore_value(fieldName, value)) or value", line 1, in <expression> Module Products.CMFCore.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.CMFCore.FSPythonScript, line 160, in _exec Module None, line 2, in session_restore_value - <FSPythonScript at /saultdiocese/session_restore_value used for /saultdiocese/DioceseOffice.2004-04-26.0049447933/WorkspaceFolder.2004-04-26.0631977769/Workspace.2004-07-15.1703647729/News.2004-10-13.7108192668/en> - Line 2 Module ZPublisher.HTTPRequest, line 1218, in __getattr__ Module ZPublisher.HTTPRequest, line 1178, in get Module Products.Sessions.SessionDataManager, line 93, in getSessionData Module Products.Sessions.SessionDataManager, line 180, in _getSessionDataObject Module Products.Transience.Transience, line 176, in new_or_existing Module Products.Transience.Transience, line 799, in get Module Products.Transience.Transience, line 548, in _getCurrentBucket Module ZODB.Connection, line 559, in setstate Module tempstorage.TemporaryStorage, line 94, in load KeyError: '\x00\x00\x00\x00\x00\x00\x05B'