Thanks for the replies. Guess I need to look a little harder at my filters. I don't mind when the ad is at the top of the page but when it starts bouncing all over and blocking the threads that is when it starts to get me angry. Just reset an "opt out" filter, now will see what happened.
Tom
You also might have a trojan in there that is allowing adds to over ride your computes security.
If you have a habit of clicking on one of those "Do you know this about ( stick a TV show or movie name in here ) " that has you clicking all over the place or any similar thing like silly tests that cause you to do a lot of clicking then you have unwittingly downloaded & installed trojans.
Similar things that are running inside another app like face book are OK but the ones that pop up around a normal page are always suspect.
IF the add is confined to the window space of the forum window then it has most likely originated from the forum.
If they extend over the edges of the forum window then they are from another app running on your computer.