[Dovecot] child (login) killed with signal 9

[Matt LaPlante]

Hi,
  I'm running dovecot on an Ubuntu server (1:1.0.5-1ubuntu2).  Dovecot
provides pop3, imap, and sasl to postfix.  The setup works quite
nicely, however I do have one error that shows up repeatedly in my
dovecot.log.

<snip>
dovecot: 2007-12-12 09:29:06 Error: child 32765 (login) killed with signal 9
dovecot: 2007-12-12 09:29:06 Error: child 18039 (login) killed with signal 9
dovecot: 2007-12-12 10:05:07 Error: child 26088 (login) killed with signal 9
dovecot: 2007-12-12 10:05:07 Error: child 5271 (login) killed with signal 9
dovecot: 2007-12-12 10:05:07 Error: child 5273 (login) killed with signal 9
<snip>

I'm not aware that this is actually causing problems, but since it
shows up several hundred times a day on a couple-user setup, I'm
rather curious about what's causing it.

Thanks,
Matt