Status report :

Upgraded from beta9 on N800 (latest Diablo SSU) and N810 (Chinook).

Upgrade went well in both cases, nothing special afterwards on N800.

At first the N810 had trouble finding the media it knew before (photos, mostly) although it had the correct folders in its configuration. With minimal fiddling (unchecking/rechecking things in the config menu and validating) and a couple of restarts things were back to normal again, without needing cleanup or deleting .canola etc. YouTube and LastFM plugins were OK on first try.

I don't know if or how it's not "ready for prime time", but all in all it was a painless and effortless upgrade here. Cheers to the team, tudo bom ! :-)