Login screen doesn't respond to cursor
After restarting I get a login screen, but I can't interact with it with the cursor. In order to log in I have to type the first letter of my account and then press enter. I tried reinstalling Mountain Lion but it still won't accept input via the cursor.
While this doesn't seem like a huge problem, I can't interact with the system restore screen (i.e., holding the 'option' key down during restart). So I can't actually restore anything in emergency situations.
Anyone else experiencing this? Is there any known workaround?
MacBook Pro 13 in (mid-2009)
MacBook Pro, OS X Mountain Lion, 8GB Ram, 320GB 7200 rpm HD