im sorry to tell you but you're an idiot.
its not about cf being bad, its about your computer screwing up files.
i dont remember if its the rez17 or 13.. but something in one of those 2 files got bugged or something, i dont really know
probably your computer turned off while u were playing, or something else happened, dont take it out on poor z8games.. they just make millions everyday on poor people who plays.