weird kmail double-messages

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@xxxxxxxxxxxxxxxx>
Envelope-to: debian@xxxxxxxxxxxxxxx
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@xxxxxxxxxxxxxxxx>
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


--
To UNSUBSCRIBE, email to debian-user-REQUEST@xxxxxxxxxxxxxxxx
with a subject of "unsubscribe". Trouble? Contact listmaster@xxxxxxxxxxxxxxxx
Archive: http://lists.debian.org/201008180719.54596.debian@xxxxxxxxxxxxxxx

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