That's exactly how my screen looked. Try doing alt-esc, alt-caps, alt-shift, and alt-tab a bunch of times. My screen did eventually reset and the game was playable. I saved it and that save had the same problem, but I saved it again and got a good save. Hope you get lucky and the game comes back for you too!
Thanks scifi1950 that worked. Managed to save it, it sticks a bit on entering the game now with the messed up UI but corrects itself after 10 secs or so. Thought my game was over, back to crushing the Onyx & Torians... or maybe it's a sign I should start a new game.
