[SOLVED] Quadro FX 3700M w 325.15 repositions monitors after sleep / power off
Usability problem solution:
System menu → Preferences → Power Management → On AC Power tab → Put display to sleep when inactive for: Never
Now I can happily work.
There would still be the question why when coming back from sleep it would put the screens not Above each other, but RightOf, even though on boot it respects the Option "MetaModeOrientation" "Above". But with never putting the display to sleep I never encounter that problem.