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 Frank and the Ghost of Christmas Past are at the office Party where the younger Frank is still working, as they stand by the entrance door two women leaving move in closer to try and avoid bumping them - despite the fact that the Ghost said earlier they couldn't be seen or affect what's going on.
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 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: 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: 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.