[Zope-dev] session error

[Gerry Kirk]

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'