[Dovecot] Assertion failed in buffer.c

[news.gmane.org]

dovecot-0.99.10.5-0.FC2

I have had a report from a user that when accessing their inbox, the 
connection is suddenly dropped. Dovecot reports the following:-

imap(user): file buffer.c: line 357 (buffer_set_start_pos): assertion 
failed: (abs_pos <= I_MIN(buf->used, buf->limit))

 From searching the list, I found an indication that it is a problem 
with an individual message. As the user has rather a large number of 
emails, how can I isolate the message?

Regards

--
Chris Hills
IT Services
North East Worcestershire College