Well I just did the update to 1.0.1.274. Guess it is not beta any more!
The update went smoothly.
It did force the firmware update (that was worrying). However, firmware update to 2.1.255.299 went smoothly too. A few flashing LEDs. Wait a mo and all good.
Smart Smoothing is different to what it was in 271.
Still not working, but need a different description.