Any chance you could put a delay on the mouse-over action on the Nokia E series banner advert? It's tight next to the close tab button on firefox so it's opening every time i close a tab and go to a new thread. Plus i've already got an e series nokia.
The creative, including any javascript actions, are controlled by the ad company who create it. We are currently speaking to them about this advert as there are a few strange things it does, and will see if we can do anything about the mouseover.