I have been really busy and hadn't had time to sit down and apply the update until Tuesday night. I let it install and didn't really think about it. Ever since then, however, the performance on my 2011 13" Air has been very poor. Everything feels much more laggy and slow-Expose/mission control/whatever is very jerky, switching between apps takes more time, even expanding menus is not smooth anymore. Also, watching CPU performance, before if I had FireFox open (Flash is NOT installed) with nothing else running, I'd be sitting maybe 1-3%. Now, it's going from 5-10% on average, and just while I'm typing this it's at 20%. As a result, CPU is running hotter and battery life is worse. Has anyone else found similar issues after applying the update? I'm not sure if there's a way for me to "reapply it" or if that would even help. I haven't done a PRAM/SMC reset yet, just wanted to get a reading on what other people are experiencing. (This is NOT a fearmongering/recall/OMG Tim Cook ruined my MBA!!! or any other sort of thread, I'm just asking a question before I go any further). Thanks!