For some reason, if I try to walk to the right from the QuickStop it's always a black screen with a big pink square. You can't see anything and you can't move. I try clicking around and it just says things about the sky, and the "don't walk in the street" and what not. The same thing happens when I drove in a taxi to that Club24. It's bizarre as the rest of the game plays fine, but it happens every time I try, so the game is obviously unplayable/winnable.

How'd you guys fix that problem?
Win 7 Ultimate, newest nvidia drivers (not beta), all windows updates installed, fast rig.