During the opening sequence B.A.'s van license is 2L83000, but later it is S967238.
At the end of the boxing match, the bad guys are shown with people seated behind them, while in the next shot you see only empty seats behind them.
When Face is applying the alligator clips to the cable feeds, the black clip falls off before he can turn the unit on.
The bugging device Face plants in the clam is just a photocell.