My kernel_task (according top 'top -u' in the term) is running up over 30% constantly again. It's been doing this for a few days now. Rebooting fixes it for a while. But, how can I tell what's causing it? My research revealed that it's something probably hardware related, but I don't have anything new, really. BT keyboard, mouse, charging iPod and a Merlin C201. Is there any error log or anything that I could use to help diagnose, other than unplugging stuff?