This morning, I opened up my sleeping MBP (Penryn 2.5 GHz, 15"), which was on battery power, and was immediately greeted by a kernel panic. I've had this computer since the day they were released, and have not yet had this happen. Not much was running at the time: Firefox 2, Adobe Lightroom, iTunes, maybe some other small things like Stickies. Before putting the computer to sleep last night, I watched some streaming TV shows on fox.com. The computer seems to be okay right now; it is running normally. My question is whether I should be worried. Is a KP a big deal? I did swap out the 2GB of RAM for 4GB of Geil RAM from Newegg, but that was more than 2 weeks ago, and I have not had any problems up until now. Do you think I can rule out RAM as having caused the KP? Thanks everyone.