I've had two replacement harddrives put into my current (2.66 Core 2 Duo) MBP in the space of a week and a half... one including data transfer from the old drive, and one without. Both of these replacement harddrives failed in exactly the same manner as the first one (HDD clicking and freezing), within a matter of hours. After writing a long email to the Apple Store who have dealt with both of these issues, they have kindly agreed to replace my MBP with the current (2.66 i7) model. Very generous of them, and I'm exceptionally grateful. I think it's a fair assumption that the repeated harddrive failures on my soon-to-be-replaced MBP are being caused by a mechanical fault somewhere in the machine... but there's a niggling worry in the back of my mind that (computer illiterate as I am) perhaps there's something in one of my saved files (Word Documents / PNGs / Music Files, nothing out of the ordinary) or backed-up applications (Office / Adium / Firefox), or even on the flash-drive it's all saved to, that might have been causing damage to the drives to the point of systematically killing all three in immediate succession. Is this even remotely possible? I'm not entirely sure how, but I'm terrified of finding myself with a brand new i7 MBP, and somehow managing to render it utterly unusable in a matter of hours. Having gotten through three harddrives in the space of a week, I'm sure you can understand the concern. So, tech-savvy people, is there any possibility at all of my saved files or apps being corrupted or damaged, to the point of having caused systematic clicking / freezing / failure of three harddrives in a row... or will I be okay to transfer all my saved files / backed-up apps to the new machine when it arrives without the paranoid fear of nuking its harddrive as well? Forgive me if this question really is as stupid as it feels. I just don't want to kill a brand new replacement machine in thirty seconds as I apparently have done with two brand new harddrives.