That "screenie" is no longer available, so, I am not sure if it's the same thing, but I also get this repeat effect like thing often. This doesn't affects my gameplay either, excpet when I am getting out of sewers (from behind the tavern), I get this repeat effect and even if I don't move, I fell down somewhere and die (this happens when I reach the top of stairs, that is where stairs and floor meet.)

I can upload screen shot if needed.