Continuity: The hole in the curtain when Polonius is stabbed.
Errors in geography: Elsinore in Denmark is a very flat, not at like the hilly landscape portrayed in the film.
Crew or equipment visible: During the "confrontation" between Hamlet and Ophelia, the shadow of a camera can be seen on the floor behind Ophelia as Hamlet begins to circle her..
Continuity: During Ophelia's lament, she reaches out with one arm to anyone who will help. In the next shot, the opposite arm is outstretched.
Continuity: Polonius gets stabbed through the stomach/chest area, but when he is lying on the floor, he is bleeding from the back of the head and the wound where he is stabbed is non-existent.