Continuity mistake: When Sandra Bullock and Nicole Kidman are getting ready to bring back Nicole Kidman's jerk boyfriend from the dead, they are going to put him on a counter that has towels and other stuff on it. The camera shows them picking him up and putting him on the counter, and when they do, the towels and stuff are all gone, without them clearing it off. (00:36:40)
Visible crew/equipment: In the scene with Nicole Kidman's exorcism, the camera pans to the area above the mantle, where previously the girls had been removing pictures. You can see a section of the wall, about the size of a picture, opening and banging back into the wall. It appears that they intended to hang a picture there and have it banging during the scene, but forgot to hang it up. (01:28:45)
Continuity mistake: When Jillian is running away with her boyfriend for the first time, when they are getting ready to exchange blood for bonding, the camera cuts to her boyfriend on the ground below the deck. Right as Jillian says "honey", he begins taking out his pocket knife. When Jillian says "need your pocket knife", he has already thrown it up to them.
Factual error: When Sally is leaving to rescue Gilly from her boyfriend she asks the Aunts to look after her children. The Aunts then say that they will take the children with them to the solstice celebration. A few days later when the cop is interviewing Sally he gives the date as March 8th. There are two solstices each year, one in December and one in June. Since this film takes place in early March, the Aunts could not have been going to a solstice celebration.
Continuity mistake: Just before Sally and Aidian kiss for the first time, (in the bedroom) they are talking about the disappearance of Gillian's boyfriend. There's one shot where Sally tucks some of her hair behind her right ear. She leaves a clump of it in front of her ear. A shot or so later, a lot less hair is in front of her ear. Just before they kiss, the large clump is back.
Continuity mistake: When Sally and Aiden are talking, Sally takes his badge. It's in her hand in one shot as she's explaining about it's symbolism and in the next, he's holding it.
Continuity mistake: When all of the women come to form the coven to drive the ghost out of Nicole Kidman, all of the women are standing holding the brooms. When Nicole gets up and rushes at them, all of the brooms are on the floor, and the women are standing back from them. Next scene, they are holding them again.
Continuity mistake: When Aidan Quinn is showing the letter to Sandra Bullock as he leaves the herb garden, the first shot is him tucking the envelope into his inner pocket in his jacket. The next shot, his hands are on his hips. The third shot, he's still tucking it away before he puts his hands on his hips.
Revealing mistake: During the exorcism, we see the women grabbing hands to form the circle, but it is the same three pairs of hands repeated several times, giving the illusion that all 12 women did it.
Continuity mistake: During the Phone Tree meeting Sally places a spell on a woman that's talking trash about Gillian. When the woman flinches from what sounds like a whack on her hand, you can see Nicole Kidman's hair pushed back behind her ears, when they show a close up of her and Sandra Bullock right afterwards, Nicole's hair isn't behind her ears and looks like it never was.