weird kmail double-messages

[Paul Cartwright <debian@pcartwright.com>]

this only seems to happen with a thread, when it gets a message in the thread. 
I don't get 2 of the original messages, but I get 2 replies, as separate 
messages, that are the same.

Debian Lenny
KMail Version 1.9.9
 uname -a
Linux paulandcilla.homelinux.org 2.6.26-2-686 #1 SMP Mon Jun 21 05:58:44 UTC 
2010 i686 GNU/Linux

here are the top 3 headers from 2 messages that LOOK the same, but the 
messages differe in size- one is 5.4KB, the other is 5.8KB:
header 1:
Return-path: <bounce-debian-user=debian=pcartwright.com@lists.debian.org>
 Envelope-to: debian@pcartwright.com
 Delivery-date: Wed, 18 Aug 2010 06:07:32 -0500
 Received: from liszt.debian.org ([82.195.75.100])

header 2:
Return-Path: <bounce-debian-user=debian=pcartwright.com@lists.debian.org>
 X-Original-To: pbc@localhost
 Delivered-To: pbc@localhost
 Received: from paulandcilla.homelinux.org (localhost [127.0.0.1])
        by paulandcilla.homelinux.org (Postfix) with ESMTP id D70E654361


can it be 2 filters?

-- 
Paul Cartwright
Registered Linux user # 367800
Registered Ubuntu User #12459