The arrow keys sort of work. When I use them the plane shivers a lot and very, very, very slowly moves from side to side. The mouse cursor is available and I can use it, but its not as functional as using the arrow keys (when they worked).

I've turned off all addons, removed all custom css, cleared cache and none of that helped.

I'm using the lastest firefox, on a laptop. I tried it in IE (the only other browser I have available) and it did the exact same thing.