Alright, so I posted in a few threads saying how I got a 320GB HDD 7200RPM and it was too powerful so it made my laptop vibrate. I went ahead and returned it for a 400GB 5400RPM. The vibrating went away, however the hard drive started to click! So I checked Western Digital's website to see some trouble shooting and they said it could be a loose cable/faulty cable or a faulty HDD. So I figured it was a faulty harddrive and today exchanged it for a 500GB. So ... guess what? I put the 500GB in, load all my stuff on it and it starts to click! It also mentioned on the website that it could be corrupted files, but I heard clicking during the Mac OS X installation, so it can't be that. I tried repairing it and everything! So being the smart person that I am (jk guys), I did some thinking. The website did mention that it could be a faulty/loose cable, so I figured... maybe the 7200RPM drive caused a loose/faulty cable? I don't know.. but I took my stock 160GB and plugged that in and it was fine. So just to confirm, I took my brother's blackbook and installed this HDD in it, just to see if it is a faulty/loose cable, and it clicked. So now I'm ticked off, I've gone thru 3 HDD's. The first one, which was the 7200RPM, was a Scorpio Black. The other two 5400RPM were Scorpio Blue's. Guys!! Please, I need some help. My friend directed me to an article already regarding these harddrive's which I'm going to read after I post this, however I want your insight as well! If anyone that has upgraded to the Scorpio Blue 400GB/500GB and has noticed/not noticed this problem, please post. If not, then post if you have anything important to say and not just "you have bad luck dude." Sorry for the slightly long thread, but I wanted to go into detail to show what the hell I've gone through. Thanks. P.S., I'm probably going to go tomorrow to get the Seagate 500GB. Good idea/no?