I've done a few forum searches, here and at the Ubuntu forums, but I can't see anyone else with this problem (or a solution!)
I upgraded to Daryna (clean install, using my existing "home" partition) today. Everything went smoothly, except that when I hit "Quit" from the menu, the system freezes. I then have to control/alt/backspace in order to shutdown, or to restart.
Not sure whether this is really a "newbie" issue- I feel sure there's an easy explanation! Never experienced this in Celena or Cassandra.
Thanks in advance for your help