Little bit later.
It happened to me every time I opened any thread. I got the same warning from Norton's. Norton's claims to have blocked it, but it does seem to be a concern.
Here is info from the warning, typed (Norton would not let me cut&paste):
risk name: HTTP Zombie Exploit Toolkit Request
attacker URL: www.smokingmeatforums.com/p.php?c=<a whole bunch of random letters & numbers>
Destination Address: files.smokingmeatforums.com (126.96.36.199, 80)
Source address: 192.168.2.3 (which is local net number of my computer).
Traffic Description: TCP, port 1981
further descriptions state:
Network traffic from <MY COMPUTER NAME> matches the signature of a known attack. The attack was resulted from
\DEVICE\HARDDISKVOLUME12\PROGRAM FILES\INTERNET EXPLORER\IEEXPLORE.EXE
Hope that helps the guys figure out what is going on.
<directions on how to turn off notification>