In the top right corner it says "Ads by Google" which means the forum isn't picking the add. If you click on it it says this:

What are Ads by Google?

Ads by Google appear throughout the web on sites that use Google's AdSense program to show ads. Sometimes the ads we show you are based on the content of the page you are viewing. Other times, the ads are intended to reflect your interests which are based on the content of the webpages from participating websites that you've previously visited. Visit the Ads Preferences Manager to learn more and customize which interest-based ads you see.
If you'd like to provide feedback regarding the site or ads you just saw, please let us know.

 

I don't see those anymore, Firefox has an ad block plug in that you just right click and hit 'block'. All the ads over and around the screen - poof - gone.