This new virus and any CAB extension should be avoided in email messages.

Bagle.GM - New Variant with Russian text ands CAB attachements
http://secunia.com/virus_information/28391/bagle-gm/
http://www.sarc.com/avcenter/venc/data/w32.beagle.ea@mm.html

EMAIL MESSAGES TO AVOID

From: [SPOOFED]
Subject: The text of the subject is in Russian.
Message Body: The text of the message is in Russian.
Attachment: One of the following: cool.cab, new.cab, me.cab, you.cab, Re.cab