on system crashes, causing apparent file corruption.  Code has been
added to check for this case and recover by truncating the file with a
log message.

Fixed bug in file-layout doc.

Added quota option.

Failures in _finish could cause the storage to hang because the
commit lock was not released.

should be a .py file, for dense folks like me that might miss that).

allowing the manager to see more than the very first 20 previous transactions.

forgotten even though they can be resurrected via undo.

ZClasses.

used an incorrect variable name.

contain too much data.

Fixed a broken return.

without the create flag. This was reported by intrepid win32
Zopistas.  Why did it work on Unix?

Changed to use has_key rather than get to work with older mapping objects.

Added important note in constructor.

Changed to use keys() rather than items to iterate over
the index.