OSX Lion included an annoying feature where you couldn't keep the MBP cooler buy running the unit with the lid open while connected to an external display. This is crucial, particularly if you're playing a game. Sometimes I'll forget to open the lid and my video will stutter because the GPU is getting too hot. There was some sort of hack for this under Lion, but if I recall, it didn't seem very safe. I was wondering if the new MBPs always had to run closed or if they fixed this issue? I would never want to run the MBP with the lid down if the unit was getting hot. You could run the laptop with the screen on, but sometimes games etc have issues figuring out the primary display. Plus having another light source from a second screen (namely the laptop) distracting. Thanks.