I didn't have anything weird installed.
One thing that I did notice was halfway though the update (after the download), the wifi connection went down. Not sure what the cause was. The update proceeded normally so I didn't worry about it. The update progress bar was about 75% complete and it just stopped and the updatable application list refreshed with a bunch of new updates available. I waited a few minutes for something to happen (error dialog, popup asking to reboot, etc.) but nothing did. I didn't bother trying to update those other apps yet but I did try to reconnect the wifi but no AP selection window would pop up. I tried the power button to reboot. No popup there either which is strange since that seems to work no matter how hooped your desktop might be.
Most of the issues in this thread seem to be users who have: Changed the way the X server works (sliderotate) Installed a new kernel or initfs Are booting from SD card Have installed powermenu ...
These things change the way the tablet works. Nokia aren't going to be able to test and support these things. It's up to the people who package these add-ons to find a way of safely reverting back to the previous behaviour if they find the world they're inhabiting gone wrong. Or to disable auto-update. Or to better inform their users.