BB Curve 8900 :: Strange New Envelope Icon On?

I recently performed a battery pull to re-establish connection with the local EDGE network, and as expected, all the emails that I received while not in contact with EDGE came flooding in. What also appeared was an icon I've never seen before, an orange envelope with a sort or ribbon encircling it, and it only appears in front of the "Email Messages" icon, not the "Messages" or "SMS and MMS" icons, and is not accompanied by the usual tiny envelope icon with the number next to it that appears on the Home Screen whenever I have new messages. I've emptied out the Email folder, but it's still there.