A co-worker put the batteries in completely backwards into her wireless keyboard. She did not connect it to the computer right away, went away for a day, came back and the batteries had leaked acid inside the keyboard and got stuck inside. Not sure if it still works - we're still trying to get the batteries out. Anyone else have this happen? What can she do? It is under warranty still, but I don't know if apple would consider it her fault because the batteries were put in backwards.