VersionProblems
The problem is that a version doesn't have to exist for it to be worked in.
Examples include using the Versioned FTP server patch from:
http://www.zope.org/Members/htrd/howto/VersionFTPServer
if you get the name of the version wrong in z2.py
Also, if you have a browser with a cookie for a version that has since been deleted.
Bugs associated with this problem can be found at: