I just bought a nice 12-inch iBook G4 off eBay. Looks and works brand new, with one exception.... the keyboard seems a little loose. Both the left and right tabs are fine, but it looks to me as if there should be a tab next to the num lock key, maybe where the light is. There looks like a slot right behind that, but there is no tab on my keyboard, so I am wondering if it is broken off. Can someone with an iBook let me know if I am on the right track? Thanks.