I don't know exactly what it is, but I've got a red tinge in the loading screens (even at the Atari-logo) menus and cutscenes and the ingame-graphics look like the mode for 3d-glasses. And it shows up since the first time i installed the game.
Is it really the 3d-mode? And where is the option to turn it off?

3D-Vision was active - turned it off and everything is back to normal.