Please fill in this template when reporting a bug, unless you know what you
are doing.
Description of Problem:

Key signatures are getting so popular that it is getting impossible to tell
a legitimate attachment from a signature key.  The majority of mail on some
mailing lists all have paperclips by them when I view email.  I really do
need to be able to tell when the mailing list members post documents.  Can
you make it so the paperclip icon changes to some other icon (e.g.: a key)
when  the attachment matches some criteria (e.g.: < 600 bytes)?

Thanks!


Steps to reproduce the problem:
1. go to www.osdl.org mailing list.
2. 
3. 

Actual Results:
paperclips everywhere

Expected Results:
different icons for different attachment types

How often does this happen? 
Way too much.

Additional Information: