Quoting Maik Jablonski <maik.jablonski@uni-bielefeld.de>:

Robin Breathe wrote:

...

I believe we have found a bug in the 2.6.1 release (possibly more specifically in ZODB 3.1.1).

----------- # Summary: -----------

When an undo is the last transaction preceeding a "pack(days:float=0)", the FileStorage is corrupted.

Hi,

can you add your whole valuable description as followup to:

http://collector.zope.org/Zope/875

Seems to be the same wired bug which killed already some of my objects...

Cheers, Maik

We are running Zope 2.6.1 on FreeBSD. Our website was down for 3 days (after packing) with a POSKeyError, probably caused by the same bug. I eventually fixed the Data.fs by using an old installation of 2.5.1 and the fsrecover.py that shipped with it. David