Continuity: Sarah Sanderson's hair changes from curly to wavy to straight throughout the movie.
Continuity: Right after they become younger, Winnie's hair is partially covered by the hood of her shawl. In the next shot the shawl is gone completely.
Factual errors: The movie takes place on Halloween, 1993. The first part of the movie shows Max at school, yet Halloween 1993 was on a Sunday.
Continuity: When the sisters have taken Dani from her home and we see her tied up, the ropes jump about between shots.
Factual errors: Salem Massachusetts does not have its own bus line. The Buses that go to around Salem are buses of the MBTA (Massachusetts Bay Transit Authority) or known locally as the T.
Anachronisms: When the kids are hiding in the alley and Mary smells the scrod, she says they are good with bread crumbs and margarine. Her character, having lived 300 years ago, would not have known about margarine which was invented in 1869.
Revealing mistakes: After the sisters suck the life out of Emily at the beginning of the movie, the girl in the chair moves her legs when they start to dance.
Errors in geography: When Sarah sings her song she's in the sky above the lighthouse along the coastline of Marblehead - one town over from Salem.
Factual errors: The real Salem witch trials began during the first few months of 1692, and were finished by the October of that same year, though in the movie they state that the Sanderson sisters were hanged on October 31st, 1693.
Continuity: After Max lights the candle, and things start to happen within the house, Dani's hat is blown off by a gust of wind. When she puts the hat back on, her hair has been blown around. When the camera cuts to her again, her hair is back in the style it had prior to her losing her hat.
Continuity: While in the museum, after being thrown to the floor, Max's lighter flies out of his hand and behind the desk. We don't see him pick it up, but once they're in the cemetery, he has it again.
Revealing mistakes: In earlier scenes before entering Max's house, Allison's forehead is clear. When she walks into Max's house while the Dennison's are calling for their parents, she has a smudge of dirt on her head.
Continuity: Right before the 3 witches capture Dani they hit Max with their powers and he falls onto his drums backwards and gets knocked out laying on his back. A minute later when Allison helps him up he is laying on his stomach.
Continuity: When Max sets off the sprinkler system in the Sanderson house, he stands directly below it and gets completely drenched. When he runs out of the house, his jacket is totally dry.
Factual errors: New Zippo lighters don't have any lighter fluid. You have to add it yourself. Max takes one off the rack in the Sanderson house, and lights it on the spot.
Crew or equipment visible: After the witches are burned at the school and the kids return home they enter the dinning room. They call for their parents and if you look in the glass on the left you can see crew and the pole for the mike moving.
Revealing mistakes: When the Sanderson sisters are hung, you can see by the knees, that they are actually hung dolls.
Factual errors: Before they go trick or treating, Dani tells Max that there is a full moon out. The movie is set in 1993, but the last time there was a full moon on Halloween was in 1974. The next will not occur until 2020.
Errors made by characters (possibly deliberate errors by the filmmakers): When Winnie is riding on her broom and pulls alongside Max in the driver's side as he is racing away from the Sanderson home after saving Dani, she asks for his driver's permit. As she died 300 years previously she would have no idea of drivers permits. Or even of cars.