dovecot - Feb 2006 - Messages disappear and reappear when I check mailbox using KMail

Not sure if this is a Dovecot bug or a KMail bug, but since it only seems to 
happen to people using KMail to access a Dovecot server or a Novell NetWare 
IMAP server, I thought I should mention it here.

<http://bugs.kde.org/show_bug.cgi?id=121866>

From the bug report:

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.


Any ideas as to what could cause this behavior in a mail client when 
connecting to a Dovecot IMAP server but not when connecting to other kinds of 
IMAP servers?


-- 
Lincoln Peters
<sampln at sbcglobal.net>

BOFH excuse #80:

That's a great computer you have there; have you considered how it would
work
as a BSD machine?

/~\ ?The ASCII Ribbon Campaign
\ / ? ?No HTML/RTF in email
?X ? ? No Word docs in email
/ \ ?Respect for open standards

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.