I may have found a solution for all the people out there who upgraded their hd's to a 7200rpm and have the clicking noise. Apple released a firmware update for the 7200rpm drives that shipped with the uMBP. You can get the file from here. I don't know if this will fix only the hd's shipped with the MBP or any 7200rpm drive but its worth a try. PS: Also i ask that anyone who tries this please report back on your results.