[Dovecot] Error: Threading lost Message ID?

[Ralf Hildebrandt]

* Ralf Hildebrandt <Ralf.Hildebrandt at charite.de>:
> * Timo Sirainen <tss at iki.fi>:
> > On Fri, 2013-08-09 at 15:45 +0200, Ralf Hildebrandt wrote:
> > > QUERY:    THREAD REFERENCES ISO-8859-1 ALL
> > > RESPONSE: [SERVERBUG] Internal error occurred. Refer to server log for more information. [2013-08-09 15:42:34]
> > > 
> > > Aug  9 15:41:48 postamt dovecot: imap(username) tTbs7oPjfACNKs4m: Error: Threading lost Message ID
> > > Aug  9 15:42:34 postamt dovecot: imap(username) tTbs7oPjfACNKs4m: Error: Threading lost Message ID
> > > 
> > > What does that mean? WHY has the Message-Id been lost? How can I find
> > > out WHICH MAIL caused this?
> > 
> > Can you reproduce it?
> 
> Yes. It always happens when accessing the user's mailbox and enabling
> THREADING in Squirrelmail.

But NOW the user cleaned out his mailbox, so I *can't* reproduce.
Greeeeat.

-- 
Ralf Hildebrandt
  Geschäftsbereich IT | Abteilung Netzwerk
  Charité - Universitätsmedizin Berlin
  Campus Benjamin Franklin
  Hindenburgdamm 30 | D-12203 Berlin
  Tel. +49 30 450 570 155 | Fax: +49 30 450 570 962
  ralf.hildebrandt at charite.de | http://www.charite.de