So I got the new 20" iMac a few weeks ago. I decided to do a small memory switch between mine and my brother's iMac. A 1*1GB stick from my computer swap with 2*512MB sticks from his computer. So anyways, here's the problem. With my brother's iMac, I was easily able to remove the Memory Door to take out the RAM but on my iMac I can't get the freaking thing off! The screw turns clockwise and counter clockwise but it won't loosen or tighten at all. Has anybody else had this problem.