Anyone else notice this, or any announcements from google I've missed?
The attachments will be scanned everytime you open the e-mail.
http://mail.google.com/mail/help/about_whatsnew.html
In my experience, that only works sometimes. Also, it is an annoying
kludge. I've taken to using different archive types, such as bzip2 and
rar. It's still something of an inconvenience, though, when I have to
change an archive from one to the other.