Has anyone had any problems with their BT Keyboard? I bought the combo with my mini, and the keyboard has since been giving me problems. At first I thought it was just the bluetooth losing signal repeatedly, but I think I figured it out. The piece of plastic that covers the batteries, I believe, is giving me problems. I think its loose. Since their are only the one "screw" at each end to hold it down, I believe it is sagging in the middle and, I guess, causing the batteries to become ever so slightly loose. If I push the cover in tight while typing, I have no problems, so I know that this must be it. Anyone else ever have this problem?