Version: unknown (using 4.3.1 (KDE 4.3.1), Debian packages) Compiler: cc OS: Linux (x86_64) release 2.6.30-1-amd64 When Compositing is enabled and Firefox is fullscreen, many actions cause the screen to blink black. Some of them are: * displaying a tooltip (mouseover, like xkcd.com) * clicking on a dropdown-list control (like the Severity picker) * exiting fullscreen (by pressing F11 again) * activating address bar search (writing anything on the address bar) * pressing Alt+F3 Both application fullscreen (F11) and kwin fullscreen (Alt+F3 > Advanced > Fullscreen) cause these. When Compositing is disabled, none of these happen.
*** This bug has been marked as a duplicate of bug 177495 ***