[Zope] Disturbing, inexplicable "broken product" entropy?

[Alexander Staubo]

Is my database detoriating? All the time now, there is a disturbing
trend for objects suddenly to cease to function, and they turn up as
"broken". Clicking on the object, I get this:

  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. 

Except we're not talking about product class instances at all -- these
objects are DTML Methods, images, folders!

Just now a folder that worked fine yesterday was no longer available.
Augh! I suspect I'm suffering from spurious data loss, but why, and how
to fix it?

This is Zope 2.0.0b1; I'm upgrading to b5 right now. If what I'm
describing is a known bug, please let me know and I'll sleep a lot
easier tonight.

-- 
Alexander Staubo             http://www.mop.no/~alex/
"QED?" said Russell.
"It's Latin," said Morgan. "It means, 'So there you bastard'."
--Robert Rankin, _Nostramadus Ate My Hamster_