Other mistake: Near the end of the movie, Ichabod, Katrina and the young boy are in the old windmill when the horseman arrives. When the three good characters jump onto the moving sails Ichabod drops a lantern down to the floor setting the whole windmill on fire. He, the little boy and Katrina jump off the sail onto the ground and start running back to their carriage some yards away. A camera shot shows the top of the building explode and we see a very quick shot of the whole windmill exploding in flames, but Ichabod, Katrina and the little boy have disappeared. Two shots later they are still running to the carriage.
Other mistake: After the midwife's son lights the candles, watch closely, as the lamp revolves clockwise, you will see the cutout of the witch on the broom. It shows the witch facing to the right (counter-clockwise), which means that the projection would and should show the witch "flying" backwards.
Other mistake: Towards the end of the movie when Ichabod discovers that Peter van Garrett and widow Winship were secretly married, we see the marriage certificate. The bride is shown as Emily Winship (maiden). Surely she should have been described as a widow because a maiden was the term for a woman who had never been married.