[Dovecot] Index corruption causes child process to die

[Juha Saarinen]

My recent migration from Courier-IMAP to Dovecot has been marred by
these errors:

Oct 24 12:12:40 server dovecot: IMAP(juha): Fixed index file
~user/Maildir/.Geekzone/dovecot.index: first_recent_uid_lowwater 431
-> 430
Oct 24 12:12:40 server dovecot: IMAP(juha): Corrupted index file
~user/Maildir/.Geekzone/dovecot.index: Duplicate header extension
keywords
Oct 24 12:12:40 server dovecot: child 5786 (imap) killed with signal 11

They happen with Thunderbird 1.5.0.7 and I'm using Dovecot 1.0RC7 from
the FreeBSD ports.

I think the index corruption may be caused by Tbird's message
filtering - I'm asking it to filter certain messages from INBOX to
subfolders.

When the error occurs, Tbird pops up an error message saying it can't
connect to the mail server, but I don't lose any messages it seems.
Instead, I get duplicates and even triplicates when I restart Tbird.

Any work around for this?

-- 
Juha
http://www.geekzone.co.nz/juha