I registered to this forum Just to help you guys... I find the problem, it is the ATI graphics card if thats the one you have. I know it will sound silly but the reason is the dynamics of the shadows.. Thats right... You cant make your 'shadows' configuration in the options - video; medium or higher, you can make it either off or low.. and also dont forget to turn of anti-aliasing.. It causes stuff too. I really hope it helps, cuz the game rocks