Just got it last night, loved it no problems. Got the update this morning and it was flaky all day, would constantly freeze/lockup and reboot. Would be fine for awhile and the the same thing happened. Finally around 3PM it just refuses to boot and is stopped with the AT&T globe on the white background.
One error I made a note of after rebooting was along the line of "Unfortunately com.google.processes.gapps" has stopped responding or something to that effect. Also had a similar error regarding "contacts".