[Dovecot] Corrupted index file w/Procmail in FC2

[Edgardo Pezoa]

Hello:

We have a Fedora Core 2 (FC2) server with Dovecot and Procmail. Versions 
are:

dovecot-0.99.13-4.FC2
procmail-3.22-13

We use "maildir" below home directory like: 
/users/operaciones/epezoa/maildir, where "epezoa" is my account.

If I receive an e-mail, is stored at "new" folder. When I try to get 
e-mail from server, message is transfered from "new" folder to "cur" 
folder, but I can't see my e-mail and Dovecot generates a "Corrupted 
index file" in log file:

Feb  8 14:02:34 dlp1 pop3(epezoa): Corrupted index file 
/users/operaciones/epezoa/maildir/.INBOX/.imap.index: index.next_uid 
(14836) > uid_rec.uid (14825)

But, If I receive another e-mail (at "new" folder) and I try to get 
messages, I get both.

My clients are Mozilla (with "pop3") and Squirrel (from another server 
with "imaps"). Both have same behavior, so I think client is not 
involved in this problem.

MTA is Postfix, but all accounts works well, except who use Procmail.

I read about locking in Procmail and Dovecot and I think locking may 
produce this problem, but I can't find what's wrong. I upgraded dovecot 
from dovecot-0.99.10-5 to try fix this.

Thanks in advance,
-- 
Edgardo Pezoa