[Zope] CorruptedDataError! Please help asap

[Gitte Wange]

Hello,

This morning I woke to an email from a customer, saying he got this error 
everytime he went to a specifik folder:

    * Module Products.PageTemplates.ZRPythonExpr, line 48, in __call__
    * __traceback_info__: here.listFolderContents()
    * Module Python expression "here.listFolderContents()", line 2, in f
    * Module Products.CMFCore.PortalFolder, line 230, in listFolderContents
    * Module Products.CMFCore.PortalFolder, line 221, in contentValues
    * Module Products.CMFCore.PortalFolder, line 194, in _filteredItems
    * Module Products.CMFCore.PortalFolder, line 591, in __call__
    * Module Products.CMFCore.PortalFolder, line 572, in <lambda>
    * Module ZODB.Connection, line 509, in setstate
    * Module ZODB.FileStorage, line 650, in load
    * Module ZODB.FileStorage, line 630, in _load
CorruptedDataError: ?????????????????????

I have looked at the archives and saw something that Dieter Maurer wrote about:
"Looks like a case for "fsrecover" (make a backup copy of your "Data.fs"!)."

fsrecover ???

Can someone please help me here ??

Please CC me on any responds as I'm having problems receiving the Zope 
mailing lists at the moment

Greetings,
Gitte Wange