Found a huge exploit with Sub-Zero today. If you get your opponent backed against the wall, and continuously use the cold shoulder maneuver against him, rarely can they block it.
Found this out while playing against a friend today. Usually when hit with a cold shoulder, it knocks the opponent backwards, but since they are cornered they have nowhere to go and you can just keep hitting them over and over and they cant get back up in time to block it. Cheap as hell, I always won when I could get an opponent cornered and pull this off.
Other bugs I've noticed are sometimes your opponent can be ducked, and blocking at the same time, and the cold shoulder will still connect.
When also playing against my friend, I could sometimes actually spear him off of the ground after i knocked him down with Scorpion. He said he had the block button pressed the whole time.