No problems with my upgrade either.
I didn't bother with a backup/restore as all my data was on the the mmc card, and out of the many programs that I had installed, I only really use one and that's vnc viewer.
So it took me less than 5 minutes to set everything back up again after the upgrade.

So far, I haven't noticed that much different. I've had one lock up with the browser which required a reboot. Is it just me, or does the keyboard look ever so slightly different ? Oh yes, I have a problem with the Shift key ... now it seems stuck so that after hitting a letter it doesn't revert to lowercase. Anyone else noticed that ?