I recently installed Ubuntu Natty (11.04) and now pressing Alt+Left/Right arrow key switches my tty to the adjacent one. How can I reconfigure the keyboard shortcuts so that this stops happening?
Update: I enabled Ctrl-Alt-Backspace restarting X. Now when I start my computer and then restart X, this problem stops occurring. However, if I don't restart X after starting my computer, this problem persists.
Another update: reinstalling the system fixed the problem.