I didn't even know there was an update until this morning when I was in the middle of a phone call and the phone started acting all wiggy. First Gmail kept popping up all on it's own and kept trying to send some bizarre message. I couldn't get to the home screen, because every time I tried hitting the Home button Gmail would pop up again. Finally I noticed the system update in the Notification bar and I couldn't get the bar to pull down. For a while I couldn't even touch the screen and get anything to work.
Eventually I managed to click on the system update in the Notification bar and it started downloading 4.4.4. The whole system kept acting wiggy until the download was complete then I was finally able to access the Home screen. I have no idea why it was acting all buggy, but once the update was installed it went back to acting normally.
Weird.....