I can't think of anything else. I never really thought about it until I had my MBP do a looping hardware test overnight. I closed the lid and when I got back 6 hours later the fans were the loudest I've ever heard. I opened the lid and the tests were still running. So I looked to see if anything was blocking the vents and that's when I saw it. The LCD hinge is simply too close to the main body and thus blocks the ONLY vent. This problem is exasrbated big time when the LCD is closed; the vent shrinks to something a knife could barely fit through. I am experiencing the Black Screen of Death along with some other odd anomalies as many other people are which is why I was doing a hardware test. This vent restriction is probably not THE root of our problems but certainly doesn't help things. Also I cannot recommend doing anything more intensive than text editing with the lid closed. Ok maybe that is a bit over-reacting... EDIT: got some pictures up. The point that I am trying to make here is that the air vent in the back is very restricted, regardless of whether the case is open or closed (tho it does seem to be much worse closed). I am hypothesizing that some of the problems we are experiencing such as the BSOD and very loud fan noise* are made much more frequent due to the very small area for the air to flow through. I'm not a physiscientist but this configuration probably also traps heat since it is harder to move air out. And contrary to what some people are saying, Apple designs these machines so they can be operated with the lid closed. I am convinced that somebody dropped the ball here. *personally, the loud fan doesn't bother me that much but I am mentioning it because I know it bugs other ppl.