unknown compression method - madness

I'm having an issue that started with the signature update dated back to around
Jan 12th, 2008 - Jan 13th, 2008. Right now I'm getting an error almost on every
other email message scaned.

I have installed an updated version of nod32 (2.7) with the same results, please help.

-------------------------------------------------------------
ESETS on-demand SCANning module, version 2.71.10, (C) 2007 ESET, spol. s r.o.

Using license:
My Company (/etc/esets/license/nod32.lic)

Signatures database module, version 2793 (20080115)
Archives support module, version 1.062 (20080115)
Advanced heuristics module, version 1068 (20071119)

Command line: amavis-20080115T160027-06366

Scanning started on Tue 15 Jan 2008 04:04:52 PM EST
object="email message", name="amavis-20080115T160027-06366/email.txt", virus="is OK", action="", info="", lines=1
object="email message", name="amavis-20080115T160027-06366/email.txt -> MIME -> part000.txt", virus="", action="", info="error - unknown compression method "
object="email message", name="amavis-20080115T160027-06366/parts/p001", virus="", action="", info="error - unknown compression method ", lines=0
object="email message", name="amavis-20080115T160027-06366/parts/p004", virus="is OK", action="", info="", lines=1
object="email message", name="amavis-20080115T160027-06366/parts/p004 -> MIME -> part000.txt", virus="", action="", info="error - unknown compression method "

Scanning finished on Tue 15 Jan 2008 04:04:52 PM EST
Total time: 0 sec (0:00:00)
Total files: 4
Infected files: 0
Cleaned files: 0
Deleted files: 0
Erroneous files: 3

 

I'm also getting this when I scan mail.

I've found the files/emails where this error occurs have winmail.dat attachments or html multi parts, at least on our system.

Surely NOD can read winmail.dat / MS-TNEF files within MIME encoded messages and HTML multi-parts?