Can anyone help here? Everytime I run left4dead 2 on my new Core i5 2.4Ghz MBP (bootcamp with Win7 64bit) It gets to the main screen, I click quick match and it begins to load, however once it's finished loading the game crashes to desktop. This has been happening since Valve updated it with the new "mutations" game. Has anyone else experienced this? I'm extremely frustrated since I love playing this game and valve don't support bootcamp on mac computers. Anyone?!