[Dovecot] index corruption bug (0.99.10.4)

Hello,

I've just upgraded to 0.99.10.4 and I think I've spotted a bug that can corrupt Maildir-index.

Reproduce it like this:

1. Get rid of all indexes e.g.: find ~/Maildir -name ".*imap.index*" -exec rm -v {} \; find ~/Maildir -name "dovecot-uidlist" -exec rm -v {} \;
2. Load Mailclient, Enter INBOX once (to have index recreated)
3. Change to LARGEFOLDER (one that takes a minute or so to index)
4. Deliver mail to INBOX *while LARGEFOLDER is still indexing*
5. Wait until LARGEFOLDER has finally opened, then switch back to INBOX

Result (for me): imap(moe): Corrupted index file /home/moe/Maildir/.INBOX/.imap.index: index.next_uid (247) > uid_rec.uid (246)

My dovecot runs on linux 2.4.19, Maildir on ext2 (softraid).

best regards