Hey guys, I'm using a 20" cinema display with my macbook 2.0ghz. I'm noticing that things like expose are a slightly jittery at times and not as smooth as they are on the macbook without it being plugged in to the display. The macbook is in lid closed mode, however when the lid is open and used in extended desktop mode it's a lot more jittery/laggy. The laptop has 1gb of RAM, would upgrading to 2gb improve this a great deal? Also, the laptop gets a lot hotter when used with the display.