A couple of weeks ago, users leaked a Symbian Belle update for the Nokia N8 which went around quickly and many tried it. Another Symbian Belle update has been leaked but its updated which is also for the Nokia N8. Looking at the screenshot, you can see that it was built on the 30th of August 2011
The software is recommended to be installed at the users risk. You do have to follow many steps to ensure that your device does work, there haven’t been any bug reports acknowledged yet. There isn’t any confirmation if you can re-flash the Nokia N8 with previous firmware files.