Oddly, I lost the ability to watch videos properly on my White 24" 2.5gb memory, 2.16ghz C2D iMac. This happens with any source (Quicktime, youtube, CNN, etc). It starts, pauses, resumes. Constantly to where it's unwatchable. This happens both via Safari & FireFox. I have used Onyx to clean, rebooted, run disk utility (repair permissions) to no avail. My activity monitor doesn't show anything odd that I know of but "Kernel_Task" is the 3rd item from the top (190.59 real memory) which seems like a lot. I'm at a loss as to what happened as I've had this computer for a long time now unless it's that Kernel Task thing. I see "Zapping the Pram" as something one can do for issues but I've yet to try that - not knowing if it's the right thing to do. Does anyone have an idea? Should the Kernel Task be sucking up so much oomph? Should I try this Zap the Pram business? Thanks.