I wanted to get everyone's opinion and also to see if anyone had this happen to them. I have a early '08 mac pro that was BTO with an 8800 GT. I had to move the computer for the first time since I've had it (got it about two months after released.) I heard something 'rattling' around inside and opened up the side of the case to see what it was. I thought it may have been a loose screw but it turns out it was the "lock" on the PCI Express 2.0 port that was broken off. I haven't messed with anything inside the mac pro except adding second HDD. I've been building machines a long time and new what this part looked like. I looked at the other PCI slots and all looked fine, no damage. So I removed the 8800 GT to take a look and sure enough the plastic end that helps secure the card was broke off. Anyways, my question is has anyone had anything wrong with there mac pro like this? I have apple care, will apple replace the motherboard? There is no way I can prove that I didn't brake it. Also, I guess it's not that big of a deal if they won't, it's just plastic and in no way effects the performance of the machine. It just bothers me knowing that something is wrong with such an expensive piece of equipment.