Oh my god! that's not a pop up ad. that's your browser attempting to open my signature in a new page.
Code:
I'm so lost :(
[flash=350,350]http://dagobah.biz/flash/badger.swf[/flash]
That's my signature, I was testing flash bbc and forgot to remove it a long time ago. I suggest you change your browser's settings to open flash pages in current tabs. But I removed my signature so it should be fine.