Title bar remains in full-screen (F11) -- does not update; just clutters screen space (FF 17).
Win 7 Starter -- FF17 I enter F11 and the screen sort-of goes full-screen. The title bar remains -- and does not update when going from tab to tab -- so I'm guessing that it is a cosmetic bug associated with the release of 17.
Start Firefox in Safe Mode to check if one of the extensions (Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance).
- Do not click the Reset button on the Safe mode start window or otherwise make changes.
Try to disable hardware acceleration in Firefox.
- Tools > Options > Advanced > General > Browsing: "Use hardware acceleration when available"