my air is rev B with SSD. when i open the lid to wake it up from the sleep, the mouse is freezing for couple of seconds and then back to normal. it's not tthe whole OS freezing i believe, because ical event suddenly appears on the desktop when the mouse is freezing. so it's not the system i guess. could it be the lack of voltage because of coolbook? but the system is so stable with these new lower voltages settings i applied a week ago. yes, i use coolbook too on rev B.