I've had my macbook for six months now and in the last two a strange thing has been happening to it. About once every two weeks, when I switch on the mac the caps lock and num lock keys are on and nothing else is responsive on the keyboard. When I reset all is fine but it's still annoying. I can't really take it for repair as I have no way of showing it to a genius or whatever because it happens randomly. Does anyone else get this or similar? Any suggestions?