It's not malware. It's a malicious image that used to be on the site that is most likely on it. In most cases, there is nothing to worry about.
Can you recall which thread(s) specifically you saw this on?
Edit: I just found the user:
http://forums.d2jsp.org/user.php?i=243826Forwarded it to a member++ for you, they take care of these kinds of things.
This post was edited by Protagonist on Mar 12 2012 06:16pm