Help! My OSX interface-graphics gets "bumpy" when no external power is connected. Has anybody experienced exposé and dashboard visual effects not appearing smoothly when the power cord is not connected to the MBP? Is this normal? Could it be the result of a powersaving feature? When the magsafe is connected everything runs nice and smoothly! It ain't a huge difference, but very noticeable, and enough to get me annoyed. I have got all the latest updates and have made no changes to the orignal hardware.