I've read about this in previous threads, as you say, and even tried it myself before starting this thread, but no matter what I do with my display adapter, the game is always stretched. I have an integrated Intel adapter and it has a "Display Expansion" feature with two options: "Full Screen (No Border)" and "Maintain Aspect Ratio". Neither of these, however, makes any change in the game. The game is always stretched. So did I miss something?
Furthermore, is it even ok, philosophically, for the game to be at the mercy of the display adapter?