Other mistake: When Hallee Hirsh 's name appears in the credits, a kid on a scooter moves across the screen, and he looks into the camera. (00:00:35)
Other mistake: After the Santa Buddies arrive and sing at Santa's workshop, it shows the town's Christmas tree magically light up and the sheriff runs out of and around the building to see it. There is freshly fallen snow, but no foot prints from him, or paw prints from the sheriff dog. (01:05:40)
Other mistake: When Ricky confronts the mother superior in the dining room, Ricky raises the axe above his head and brings it straight down in one single motion. Both Ricky and the mother superior are facing each other. At that angle, it would have been impossible for Ricky to decapitate her. At best her head would have been cleaved in half, but not decapitated.
Other mistake: When Howard is running behind the car driven by the lady in the fur coat, he's always shown directly behind the center of the car, but when the lady looks in her side mirror (from her point of view), Howard is in the center of the mirror. In reality, she would only see a part of Howard's left side in the reflection (not his whole body).
Other mistake: Dad has a long drive home, travelling through the mountains during a snowstorm. Dad pulls into the driveway and his truck is clean, with no splash marks. (01:12:05 - 01:14:35)
Other mistake: In the courtroom scene, the North Pole expert is an Air Force lieutenant colonel, Lt Col Coulson. In the credits, he is listed as Cmdr Coulson, a Navy rank.
Other mistake: When Charlie is helping Jack watch TV through the window, his mother comes in and talks to him. By this point Charlie has stopped changing channels, but we can see the channel change effect once more.