Installed on my Gigabyte GA-Q77M-D2h / i7 3770 system and got a kernel panic on some USB audio something or other. Forgot to write it down. Rebooted with a -x flag, ran Multibeast to install onboard audio (even though I use a USB DAC), rebooted. Everything seems fine now. It's reason;s like this that I'm glad I back my system up before updating. Fortunately, I didn't need it this time.
Updated from the App Store. Now my system hangs about one third of the way across the blue progress bar. Tried restarting with – X and – V but all I get is an auto reboot after all the extensions load.