I have a rMBP and after 10.8.2 was released, when I go to in plug one or multiple monitors at the login screen, it only shows my login screen on 1/4 of the monitor and gives me the rainbow wheel, resulting in having to reboot every time I connect a monitor. After the reboot the monitor(s) work fine. I have tried waking the computer up first then plugging in, plugging the monitor then waking up, reset PRAM, and still nothing works. Is anyone else having the issue with 10.8.2? I never had this problem in 10.8.1.