I have the current version of Firefox installed. Recently, perhaps with the most recent install, I'm not exactly sure, a white stripe appeared at the top of the browser, right under the search and URL boxes at the top of where websites would normally show, a white stripe about a 1/2 inch thick has appeared. Not on every single site, google.com works fine, but for example, it blocks out the home, connect, discover and me tabs on Twitter. Or if you go to mozilla.com, the tabs at the top of the mozilla site briefly show, then are blocked by the white bar. You can't click on any of them, even if you have your mouse pointed at the right spot. You can refresh the screen and they'll briefly show again, but not long enough for you to click on anything. I've run a number of search engine queries trying to find out how to get rid of this problem, but I'm only finding resolutions for webmasters, not for end users who have to deal with this problem on the other end of the browser. Anyone know how to get rid of this nuisance? I'm about ready to uninstall Firefox because its useless on many sites with buttons and tabs on top.