Well mystery solved. I did a bit of sleuthing and noticed they have a scratch card at the bottom of the page. I had written a scratchpad plugin so I did a quick search for "wScratchPad" and sure enough it's there. They copied my sample code from http://wscratchpad.websanova.com, div's css and all and, you can even see the same `id` and `class` names.
I guess they copied a little too much.