I've got a new MBP with a 5400 rpm HDD sitting in front of me and every few seconds the hard drive emits a fairly loud 'click' or 'chick' noise. It is actually pretty annoying and has been loud enough to prevent me from sleeping when the laptop is left on overnight. I'm already taking it back to the store because the 5400 rpm HDD isn't fast enough to edit 1080i video in FCP without dropping frames (probably my stupid fault for not realising that in the first place) but I'd be interested to know whether the 7200 rpm drives emit a similarly loud click. Anyone with a 7200 rpm drive (250GB specifically) heard anything like this?