Hi, I have a graphics problem when I launch the Civ IV demo version 1.61 Rev A. The game launches fine and selecting my civ and level look fine. When the game map appears, I can see my characters and some features but all the land area is black with tiny white dots everywhere. It looks like my settler is standing in outer space. I have tried the lowest graphics settings and tried launching in a window. I have a new 24" iMAC (7600GT). My OS level is 10.4.7. The demo works fine on my Mac Book G4.