That is a missing Down Pointing arrow Gif. If you click on it, you will be greeted with a small menu that allows you to pick what page of the Lounge forum you want to go to. It doesn't show in Chrome, and the image url takes me to a short error page about how the lounge has undergone some changes and old links may no longer work.
nobody ever slaughtered an entire school with a smart phone and a twitter account – they have, however, toppled governments. - Jim Wright