Continuity: In the scene where Kat is being introduced to her new classmates, Casper is seen tying the students' shoelaces together. This includes the snobby blonde sitting in front. But when the camera pans out, her feet are clearly too far apart for this, not like how they showed them while being tied.

Continuity: At the part when they are in the closet, the light bulb is swinging back and forth and in the next shot it is either stopped or it is gone, one of the two.

Continuity: When Dr. Harvey sees his dead wife, Amelia, for the first time as a ghost, he talks to her half way up the staircase in the manor while the party is going on.  The camera changes angles a few times from the side of their heads, to Amelia's view of Dr. Harvey.   In each different camera angle, his hair changes place, from the side of his head, it slips down in front of his face.

Continuity: Kat has different rings all the way through the movie. Like when she's hugging her dad after he became human again, she is wearing one ring on her middle finger. Then on the next shot, the ring is gone.

Continuity: In the beginning of the movie, when Kat meats Casper, his hand goes right through hers, indicating he wouldn't be able to hold onto flesh without going through it, but there are plenty of time during the movie where the ghosts hold onto people. Casper is even able to fly while dangling Kat.

Other: As the priest walks out of the haunted mansion with his head twisted, you can see the head and body don't step in time together.

Continuity: When the priest comes to Whipstaff in the beginning of the film, his cross is firmly snagged on his button. Next shot, it is perfectly free from being stuck.

Continuity: In the scene when Dr Harvey is fighting with Stinky, Fatso and Stretch, he gets smelled out and rolls up in the red carpet down the stairs. When he unrolls out of the carpet, it is obviously a much shorter carpet.

Continuity: When Kat finds the button in the book it is covered in dust. When the camera angle changes it is wiped clean.

Visible crew/equipment: In the scene where Bill Pullman is in his office room, in the mansion, the 3 ghosts lift him in the air, you can see the wires lifting the chair.

Continuity: When Kat's dad is fighting the 3 ghosts in the beginning, one cuts off his pants. Right after, when he gets the plunger, they're back on him again.