Forum and Java update malware?

[Uthgaard]

If you see anything like that, make a note of which ads were displayed at the time and which page it was on.

If it's recent enough, you should be able to go into offline mode and revisit the page as it appeared, firefox has a more detailed and accurate cache than ie though.

[Zallar]

Make sure your Java is patched to the latest version to prevent banner ads from injecting malware.