OK so a few hours ago I had my first kernel panic on my MBP 13" 2.66 GHz. This occurred a few days after I had swapped out the stock 320GB Seagate Momentus for the 160GB Hitachi Travelstar that was in my 2009 MBP 13". I did the hard drive swap because the Seagate was too loud and the Hitachi was quiet and fast. But anyways once I swapped the drives, I used the Seagate as a time machine backup. I had that plugged in and my Toshiba external plugged in and was browsing Safari, Firefox and had Word, Reeder and iChat open. Is there any reason for concern of this? What could have caused this?