dovecot - Jul 2007 - some mail reappears or marked as read again

Sometimes a mail - already read or moved into another folder - appears again in 
the INBOX. I was not quite sure about this but today is once close the mail 
client (thunderbird 2.0.0.4 on fedora 7) and the only mail in the inbox was mark
as unread.

I think it happens in other mailboxes too.

But it might be a client problem as I changed to dovecot and thunderbird 2 (from
1.5) nearly at the same time - but i think it happens before with thunderbird 
1.5 too).

In the logs there is nothing but some logins/logout.

(the "dovecot -n" is attached)
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Problem solved ...:

Herbert Gasiorowski wrote:
> Sometimes a mail - already read or moved into another folder - appears 
> again in the INBOX. I was not quite sure about this but today is once 
> close the mail client (thunderbird 2.0.0.4 on fedora 7) and the only 
> mail in the inbox was mark as unread.
There was a second connection to the old imap server.
Since I have stopped that there are no more re-unread messages!