[Dovecot] Messages disappear and reappear when I check mailbox using KMail

[Timo Sirainen]

On Sun, 2006-02-19 at 19:45 -0800, Lincoln Peters wrote:
> When I check for mail on an IMAP account (not disconnected), all 
> recently-received messages disappear prior to any mail check, any new 
> messages appear, and then the messages that disappeared earlier reappear.  
> This does not seem to cause any harm, but it is horrendously inefficient if 
> there are a lot of messages in an IMAP folder so affected.

What Dovecot version, and are you using mbox or maildir? Is there
anything in Dovecot's logs?

One possibility would be changing X-UID headers in mbox files.