Since upgrading to 10.9.2 the other day, I've now had two times the message that I'm out of RAM, when I check Activity Monitor, I find Kernal_task has hit 9-10 gigs RAM. It's tied to Firefox, which averages 2 gigs RAM (I have lots of tabs/windows). When I force quit Firefox, Kernal Task dropped to 1.5 gigs. This didn't happen ever before the upgrade to 10.9.2, and that's the only change in software or behavior since then. Anyone else seeing this problem?