E-mail Virus?
 

In the past couple of days, I've noticed that a few times I've gotten 2 copies of the same E-mail message, from different senders. The first time it happened, I thought the user had me on 2 mailing lists or something. The second time, I thought it was user error. Then I just started getting irritated, but didn't think anything of it.

Just now, one of my attys asked us if we've been getting multiple copies of the same E-mail message. Is this a new virus? Has anyone else been experiencing this?