Evil UID? (was: more problems with gmail. Offlineimap 6.2)

[Uwe Brauer]

>> "Uwe" == Uwe Brauer <oub at mat.ucm.es> writes:

   > Hello
   > I finally come up with a radial solution.


   >     -  Offlineimap also downloaded [Gmail]/All Mail and
   >        therefore doubled my mail on my dovecot imap server.
   >        All the folders+[Gmail]/All Mail 

   >     -  The Folder INBOX is now empty!

This folder is the *only* folder for which the following
message pops up.

Syncing INBOX: Gmail -> MappedIMAP
WARNING: UID validity problem for folder INBOX (repo
UniLocal) (saved 1309334376; got 1355232397); skipping it 

Why?

Uwe Brauer