[Zope] Zope ZODB console error message interpretation

[Dr. Ross Lazarus]

I'm getting the following messages appearing with some regularity now
that I'm running zope 2.1.4 using the -D switch

------
2000-02-23T09:08:03 ERROR(200) ZODB Couldn't load state for
'\000\000\000\000\000\000\036M'
------
2000-02-23T09:08:03 ERROR(200) ZODB Couldn't load state for
'\000\000\000\000\000\0006K'
------
2000-02-23T09:08:23 ERROR(200) ZODB Couldn't load state for
'\000\000\000\000\000\000\036M'
------
2000-02-23T09:08:23 ERROR(200) ZODB Couldn't load state for
'\000\000\000\000\000\0006K'

Packed database - no change. 

Messages appear when zope is asked to do something after a period of
inactivity - presumably something's been flushed from the cache and is
causing problems when reloaded.

Any suggestions as to how to locate and remove the offending objects ?