My psychic debugging skills tell me that the Alt key has gotten stuck down in the emulated machine. Try focusing on the emulator and hitting Alt a couple of tim

My psychic debugging skills tell me that the Alt key has gotten stuck down in the emulated machine. Try focusing on the emulator and hitting Alt a couple of times. (This can happen e.g. if you alt-tab away from the window: the emulator sees alt-down, but the alt-up happens in another window and the key stays stuck down in the emulator.)