I'd been running v 1.2.0, the last OTA update that was provided, until ronstev advised me of an update available from  http:/www.nzdsl.co.nz/zinwell/ to v 1.2.2.

I've been running this for a few days now and found that it seems to have improved the shuttle responses from the remote during playback. Haven't noticed any other improvements.

On the other hand it has introduced a new bug.

While recording from a programmed event out of standby mode, if you then bring it manually out of standby in order to watch another recording it does not stop recording at the end of the programmed event.
Instead it continues to record indefinitely - or at least for the next 4 hrs - I haven't left it longer than this without doing a manual "stop".

I've noticed that the bug to confirm file delete by mostly having to hit the reverse direction arrow is still present too.