Charlemagne

That's not very precise information - to what resolution did you change your display settings? From my perspective it was perfectly precise, otoh you're not able to read my mind. I tried every setting the game offered. Oh, and thx Nonny.

I'd done all that with the 3D options. Those solutions were easy to find with google, even if they didn't work. I did not know it was even possible to turn off a GPU. Is it possible to have it only turn off when the game is on? Or, more useful, is it possible to set the game to only run on one GPU while the other handles everything else?

I am having the same problem on windows 7. Changing resolution did not help. I'm on an alienware with two ATI Radeon HD 5670 cards. This bug almost makes it unplayable. I have to save and then delete cities if I want to play the cities behind them. (Otherwise the big yellow squareness blocks out the cities in back of it.) I have the same problem with and without NAM. I have uninstalled and reinstalled the program. I've tried to use every resolution and graphics option the game gives you in the region map, to no avail. HELP! (Pretty please.)