Since upgrading to Mountain Lion on the Macbook Air, everytime I wake it up from sleep it will come up with the message that application memory is full even though with terminal open it's clear that I have plenty over RAM available. It's annoying since I usually only have Chrome with a few tabs open. Thus, I have to force quit it and then open it again, and then there are no problems. Why does it keep saying to me that I have no ram when usually I have over 4gigs available? 