ML is holding 4.85gb of inactive memory leaving me with nearly zero free memory! I've only got the basic apps running: Calendar, Mail, Twitter, Messages, Safari, iTunes. This shouldn't be happening! Not with a mid-2010 MBP and 8gb of RAM! Even after a purge or reboot, the RAM fills up FAST. What's going on? Is this a BUG? EDIT: How embarrassing for me. Looks like the reason my memory was going mental was because the App store got hung up on a big App update. It just finished and freed up a whole bunch of memory. I apologize for wasting your time. Please remove this filth from the forum. Crisis averted and aborted.