[Dovecot] bug? Maildir ... sync: UID inserted in the middle of mailbox

[Peter Gervai]

Version: 1.00alpha2


Error: imap(grin): Maildir /home/grin/Maildir sync: UID < next_uid
(94 < 95, file = 1127311363.H977932P25148.gollum:2,) 

       imap(grin): Maildir /home/grin/Maildir sync: UID inserted in
the middle of mailbox (95 > 94, file =
1127311363.H977932P25148.gollum:2,)

This error reappears frequently. 

Doesn't go away by restarting dovecot, but does go away when I delete
all index and cache and whatnot (and restart dovecot).

Appears in 10 minutes again...

Could be sylpheed-claws-whatever-alpha imap problem, but whatever the
client does dovecot shouldn't be fall apart I believe.

Peter