Hello guys, I have MacBook Pro early 2008 running OS X Lion. I've noticed today that the F8 key stopped working. It doesn't open iTunes anymore, doesn't play or pause songs, and the forward and backward keys also don't functioning. I created a new user account to check if the problem is in the button itself or in the system. Luckily, the buttons functioned well when I tested them. I went back to System Preference in my user account and restore all keyboard short-cuts settings to defaults. Unfortunately, it didn't help at all. Any suggestion what to do next?