I've been having this issue for the last couple of days now, on both of my computers. After reading through a thread, I wind up having issues when I press the "back" button. I just wind up staying on the same page, and at the bottom of the screen, I see that I am being held up by what I think is an ad:
If I click back in rapid succession, around three times, I will finally be taken to the previous page, however, it is still very annoying. This sort of thing has happened before, and was fixed rather quickly. Wondering if anybody else is having issue with it as well.
Also, I'm getting popup flash ads wondering if I want to take a survey on the site again. As mentioned above, this too is an old issue, re-surfacing.