Mysterious banner ad appearing at the footer
 

This is not a vBulletin issue, but I have always had great luck with the SMEs here: I have a flash banner ad appearing at the bottom of my forum. It appears in all styles, and when I check the templates, I do not see anything related to an ad there. I checked using IE8 and Chrome. It's possible I am overlooking something, but what? You guys have any ideas where to look for this?
Attached Images

• https://www.vbulletin.com/forum/images/attach/jpg.gif whatbanner6.jpg‎ (67.7 KB)