[Zope] Is data.fs corrupted?

[Alexander Chelnokov]

Hello All,

After a linux machine crash or cold restart something strange is going
on with Zope (2.2.2) - all objects built on ZClass-based products like
Yihaw or QSurvey are broken. Products are in Product folder, and i
even can add an object and it works, but when i try to access it in a
new browser window it reports
==========
This object is broken because the unknown product that created it is
no longer installed or is installed incorrectly. Please contact your
product vendor for assistance.  
Note that the data associated with this product has not been lost, and
will be accessible again if the product is reinstalled.
==========

Well, i removed QSurvey and tried to re-install its current version -
something goes wrong again:

==========
Zope Error
Zope has encountered an error while publishing this resource. 

Error Type: Could not load oid ={, pickled data in traceback info may
contain clues
Error Value: None
==========

Is there any way to fix ZODB less radical than complete reinstall?

-- 
Best regards,
    Alexander N. Chelnokov
Ural Scientific Institute of Traumatology and Orthopaedics
7, Bankovsky str. Ekaterinburg 620014 Russia
ICQ: 25640913