Same thing here. Firefox window, when maximized, stays on top of desktop (i.e. right clicking anywhere shows firefox's context menu) but is invisible.
Fiesty Herd 5 (2.6.20-9-generic ), ATI AIW 9800, free driver, all latest updates. -- Cannot see firefox window invisible when maximized when desktop effects is enable. https://launchpad.net/bugs/89712 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs