After the Nexus 10 loop reboot blues, re-imaged and got it on its feet once again.
Installed Spotify yesterday, in order to test the Chromecast Audio with the little lappie, but a problem showed its head...
After installing it, Spotify did nothing, except for a little icon on the top Taskbar that uipon expanding it said:

Spotify: No Storage Area Found

To put Spotify to work, did this:

Settings > Storage > Apps > Spotify > Clear Data

Start Spotify & login
Bingo

Now I have to workout why the tablet and/or Spotify refuses to scrobble...
Of course, as predicted, the thing with the Chromecast Audio is probing to be really unpleasant.