I have tried searching, but couldn't find this specific scenario. I have noticed that when I use my MPB over the course of the school week, that when I check my activity monitor, my RAM usage goes from 1.36gb (from startup) to about 3.60gb (at the end of the week or a few days later). Now I know this is what is supposed to happen when you are using programs and leaving them open, but in my case, I close out of everything completely before I go to sleep. No safari, no iTunes, nothing and my RAM usage is still extremely high. The only solution I have found is to restart and back down it goes again to 1.36gb. I notice no difference in performance, I was just curious if this was common or supposed to happen... Thank you.