I didn't make it!
Hmpf... strange problem you have there. This is something totally new to me. Honestly , I don`t know what to suggest you except what I suggest to everyone who has some graphic or graphic related problem: Try reinstalling and updating the game. That usually helps. Newest avaible patch version is 1.08 , I think. If the problem remains , try reinstalling and / or updating graphic drivers. I don`t know what else to suggest you. Sorry.