At the end of (part4?) in episode one, right before the Nedrey jeep area.. the game puts me back to the main menu and doesn't unlock the next sequence. I've replayed it, and both times, right when the clearing is found this happens.
There are also times, when the menu options are invisible.
Any advice or patch forthcoming?
OSX Lion 10.7.2 (up to date). 8gb ram, 2.2 ghz I7, Radeon 6750 1gb vram (dedicated).