Bought a magic trackpad off someone on here a while back and don't really use it often, but I just had a look at it and it seems to have developed a crack or split in the top left hand corner (Underneath the battery compartment) reckon this will be covered by warranty? I've certainly never dropped it. Only thing is the nearest Apple store is ages away and I can't find a serial number on the trackpad to check it online. Any ideas?