Offlineimap duplicating email redux

[Edward Z. Yang]

Excerpts from Sebastian Spaeth's message of Thu Jan 20 07:00:28 -0500 2011:
> It would be great to get feedback/testing on that code. Now that I
> resurrected it, I made a backup of my maildir and will be running it for
> a while...

I will take a look, but out of curiosity, won't bugs in OfflineIMAP still
effect the IMAP account you do testing on?  How do you back that up?

Cheers,
Edward