Actually, it looks like a problem with the game itself. Seems to happen in the retail version as well, so I doubt it's the crack. I think our only option is wait for a patch. Sorry dude.
It does the same to me, but only when I use the XBox360 Wired PC Controller. I'm not entirely sure, but I think it might be a controller issue. I haven't played the game that much, but when I tried wi ...