Hi Ron,
which recent MS update are you referring to?
The example provided in your post is from Microsoft Security Bulletin (MS01-020) Incorrect MIME Header Can Cause IE to Execute E-mail Attachment. Originally posted: March 29, 2001
Updated: June 23, 2003
Are you referring to the recent Swen Worm posted on September 18, 2003? This one?
http://www.microsoft.com/security/antivirus/swen.asp
I just want to be sure I know which one you are alerting us to.
Please specify the update number to confirm...
Thanks,
Duane