Here's an interesting one, and maybe I'm missing something.
Installed the update and everything worked as planned. Reboot after all the installation stuff to the login screen. Click on my main user account and it accepts my password, but then just sits and spins. Occasionally giving me the rainbow wheel of doom, but other than that just spins. I can move the mouse and stuff so it's not frozen.
So I hard reboot from the drive and get back to the login screen. This time I select a secondary user account and when I enter the password, it spins for a second and then prompts me to enter my Apple ID and do the initial configuration bit. Then I get to the desktop...
After some consideration, I realized that my main user accounts Home folder is located on a separate disk and is configured as such in the Users pref pane. My secondary account has it's Home folder located on the same disk as the install. I'm not sure why it makes a difference, but I can get passed the login screen with my main account.
Any one have any ideas?
EDIT: After login with my secondary account, I was able to change my primary account's Home folder location to the local folder on my main drive. I logged out of secondary, and was able to login with primary without issue. However, none of my Applications, Music, Movies, etc... are there because they all reside in my original home folder. Is this perhaps a permissions issue? I can't relocated all of my original Home folder contents because there isn't enough room on my main drive.