One of my admins pointed this out: The "false" appears where the Facebook code normally displays. Screenshot below. Further info: Confirmed in a later post: he has had the same Opera version for a couple of months, but this problem only started in the past couple of days. He has tried other XF forums, including this one, and has the same problem. My guess is that something minor changed in the Facebook API, as XF and Opera are the constants. I also know that when I had some advertising code on one of my old sites, the banners loaded in a way that I'd have to hit the back button a few times to actually hop back one page; I think what was happening there was that the browser was hopping back to the different portions of the same page that loaded at different times, rather than going back one actual page. And in the history (under the "back" button), you would see the actual previous page a couple of spots behind the current page, rather than being the next one. Hope that made sense... Let me know if you need more info. Thanks!