Timestamp on NOD32: Alert mail one hour off

I'm a new user, been searching the forums for this one and haven't found it. I hope it's not a repeat.

Windows Xp Home, timezone set to GMT-5 Eastern Time US & Canada.
Automatically adjust clock for for daylight savings time is checked.

When NOD32 sends me an alert email, The timestamp in the headers look fine, but the timestamp reported by my clients (Thunderbird, "Date" column, Outlook "Sent" field) is one hour ahead.

For example, the following is reported to have been sent at Fri 10/5/2007 1:06 PM
================================================================
Return-Path: <david@egh.com>
Received: from mia.egh.com (Mia.egh.com [198.179.132.105])
by shady.egh.com (8.13.4/8.13.4/SuSE Linux 0.7) with ESMTP id l95G5ik0008817
for <david@shady.egh.com>; Fri, 5 Oct 2007 12:05:46 -0400
Received: from RIDDLER (Riddler.egh.com [198.179.132.101])
by mia.egh.com (8.13.6+Sun/8.13.6) with SMTP id l95G5gox006487
for <david@egh.com>; Fri, 5 Oct 2007 12:05:44 -0400 (EDT)
Message-Id: <200710051605.l95G5gox006487@mia.egh.com>
From: david@egh.com
To: david@egh.com
Date: Fri, 5 Oct 2007 12:05:46 -0500
Subject: NOD32: Alert

10/5/2007 12:05:39 PM - During execution of NOD32 - On-demand scanner on the computer RIDDLER, the following warning occurred: An alert has been generated. See the on-demand scanner Log for details.
=================================================================

Is there an issue with NOD32, alert mail, and DST?

Thanks,

David