Continuity mistake: The scene of Dr Loomis talking to Michael in his room, scene from the TV cut, shows him sitting in a chair his arms down at his sides. A shot of Loomis then back to Michael show his hands on his knees. Another shot of Loomis then Michael shows his left hand still on his knee but now his right arm's down at his side.
Continuity mistake: At the beginning of the film the Myers' house is within walking distance of the Strode house, both of which are on one side of town, while the Doyle and Wallace houses are on other considering the driving distance Annie and Laurie had to drive to get to them. But at the end of the film somehow the Myers' house is now within walking distance of the Doyle and Wallace houses.
Continuity mistake: At the beginning of the movie the only light on in the house is from Judith's room, which she turns off. Michael is seen walking through a dark house with only the hall light on. When he comes outside after killing Judith every window in the house has a light on. He didn't have time to turn them all on as he ran down the steps.
Continuity mistake: At the Wallace house, there are windows on each side of the door. They have different designs on the inside and the outside.