User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:2.0b7pre) Gecko/20100916 Firefox/4.0b7pre Build Identifier: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:2.0b7pre) Gecko/20100916 Firefox/4.0b7pre I was testing the new "App Tabs shown in Panorama" feature, and set both of my open tabs as App Tabs. When I entered Panorama, I didn't see either of the App Tabs and the Ctrl+Space/Panorama button didn't escape me back out (neither did the Esc key that I can remember). Had to close Minefield then start it back up to have it usable again. Reproducible: Always Steps to Reproduce: 1. Have all open tabs as App Tabs (did it with two but just one should work the same). 2. Enter Panorama mode. Actual Results: User gets stuck in the mode and can't get back out. Expected Results: Should be able to escape using any of the available methods.