Factual error: When Howard runs into Ted and the reindeer, the reindeer's antlers are still in velvet. Velvet is shed in August, at least four months before the Christmas Eve setting.

Continuity: In the scene where Howard is 'going to work' and Jamie is trying to talk him into staying, at first the cereal bowl has only a little bit of cereal. Then in the next shot, it is almost full again.

Continuity: Howard knocks the wiseman's head into the fire. In the wide shot before he notices, the head is no longer in the fire, but in the next shot, it is once again in the fire.

Continuity: When Howard is first talking to the Santa in the department store the Santa tells him to "...Have a little respect for the beard" then part of it slides off like it was glued on. He then sticks it on again. Problem is, when they are fighting at the conmen's hideout, he takes him down by pulling his beard - that is now held on by an elastic cord and snapping it back. Granted it is not the same scene, however the only thing that happened between these two shots is them driving to the hideout and he would have had no reason to change it.

Continuity: In the scene, when Liz (Rita Wilson) is making cookies, Ted (Phil Hartman) comes in. In the shot, when she is scooping the cookies off the baking tray onto the plate, she only has 1 on the plate. The camera then goes to Ted, and in the next shot, nearly all of the cookies are on the plate. How could she have done that so quickly? They were so neatly arranged on the plate, and none were broken.