My base rMBP seems to be eating memory like mad. I was down to 4xxMB just doing typical tasks today (itunes, safari, etc.). Resetting got me back to 6GB. Do I have a problem? The attached pic is with NO apps running. I KNOW someone is going to say I should have gotten 16GB but I figured 8 was sufficient for some routine things. It's like the memory is not freeing up like it should when apps are killed.