Demo - unusual graphics problem

[jens]

Can you try and run the game in window mode and at a different resolution and see if that helps?

Also, perhaps open the ATI control panel, ATI Catalyst or what it is called, and see if there are some settings that can be turned off. For example if there is something set top be "forced" perhaps change it to "let the appliaction decide" or if there are settings with optimize or auto in the names, turn them of as those type of "improvements" can at times cause problems.