Mine was upgraded over wifi and then started rebooting over and over. One time I did get as far as the time/date/region setting screen and noticed that that it now supports Australia! Yay! Happy about that. But then it started rebooting again. It seems to reboot just as it is trying to display the home screen. I assume there is an app I have installed that is conflicting.. Painful as I don't have my usb cable here with me.
Update appeared for me in the application manager, but when I tried to install it, It requested I use the "nokia software updater" application. And so I did, 157MB download, and about 5 minutes install, All my settings are gone, wallpapers, openssh server... etc etc.