A friend has problems with his Shift Key. Basically, it doesn't work. Caps Lock works, but it is awkward to use. If he opens the Keyboard Viewer and clicks on Shift, the keys change from lowercase to caps, as they should. However if he presses the either of the keyboard shift keys, the characters don't change. I'm guessing he has a bad keyboard. Is there any way he could have changed the Shift key to another function by accident? He is using System 10.6.8.