I was able to update without restoring to stock in anyway. Still have root and my files that were frozen in Titanium Backup and manually .bak'ed are still same AFTER update. I even have a older version of the market installed and .bak'ed the new market and associated directories. Still went through. So you all may not have to revert to stock. Sent from my BIONIC out in the boonies of TN while picking a guitar!