Revealing: When Clark grabs the curtain to smother the fire on Louis it is a much younger stuntman with dark brown hair.

Continuity: The retractable attic staircase is a type held closed only by light spring pressure, not a latch, but it doesn't budge when Clark jumps on it. When he initially opened it, and later when his wife does the same, it opens normally with a light tug from below on the cord.

Continuity: In the scene where Uncle Lewis and Aunt Bethany have just arrived and Aunt Bethany says, "Oh dear, did I break wind?" Ellen helps Aunt Bethany fully remove her coat. Seconds later, within the same scene, Ellen is still helping Bethany off with her coat.

Continuity: When the squirrel jumps out of the tree and the whole family is hiding around the corner in the front entry, the camera alternates shots frequently from the front of the family to the back of the family. Each time the angle changes, Ellen's stance changes from her arm being around Russ to her arm at her side.

Continuity: When Clarke is installing the Christmas lights, the rope on the ladder keeps appearing and disappearing.

Visible crew/equipment: When Ellen opens the door after Clark falls from the tree, there's a strange white thing visible for a few frames at the upper left of the door. Might be the hand of a crew member opening the door.

Continuity: In the scene when Clark is going into the attic to hide presents, the ladder that smacks him in the face is a sliding ladder, but later when he is shut in the attic and uses the ladder to attract attention it is a folding ladder.

Revealing: When Clarke and Eddie push the couch to see what happened, the burned cat is only visible in closeups. There's also a blue object next to the couch that look like an iron that is creating the smoke effect.

Revealing: In the scene where Clarke cuts the ropes on the Christmas tree in the living room, if you watch in slow motion you can see large wooden poles connected to the branches of the tree as they burst through the windows.

Continuity: After we see the cat pulling on the strand of white Christmas tree lights, there is a close up shot of the electrical outlet with one cord plugged into it. When Clark sees the lights go out, he sees both the colored and the white lights go out at the same time. Clark has to plug in two cords to make both sets of lights come back on. Either the colored lights should have been out to begin with, or both strands of lights should have come on with one plug.

Continuity: After Clarke falls in the bush, the gutter repairs itself.

Continuity: When Clark's neighbours return home, the man says to Clark, "Where do you think you're going to put a tree that big?" The trunk is very large, bigger then Clark's feet. Clark replies, "Bend over and I'll show you." Then Clark cuts the tree trunk - it is very thin and easy for him to cut.

Continuity: When Todd, the snob neighbor, fall's down the stairs, his wife Margot is not visible in the bedroom.

Other: In the scene where Clarke and Eddy are drinking egg nog by the tree, and Snots is drinking the tree water, look at the tree's trunk. It's a birch tree not a pine.

Continuity: When Clarke is going crazy, he cuts the baluster. But it's still in place the scene later, when the family have problems with the squirrel.

Revealing: When Clark falls from the top of his house, he grabs the gutter. It bends and a icicle is thrown from it to his neighbor's house. You can see the thread which guides it.

Other: When Uncle Lewis lights the cigar that sets the Christmas tree on fire, watch closely. It shows side shots of Clark eating his dinner, and you can see the tree in the living room. The camera cuts back to Lewis lighting his cigar, and then back to Clark at the exact same angle as before. However, this time the tree is gone. Then you see the flames shoot out.

Continuity: When Clark's uncle drops the match that sets the sewer on fire, his toupee falls off and at the end of the scene you can see him trying to put it back on, although it's burnt pretty badly. In the final scene where everyone is dancing around, his toupee is back on and in perfect condition.

Continuity: When the family is on the front lawn to inaugurate the Christmas lights, between shots a blue Lincoln at the curb disappears and a station wagon appears across the street.

Continuity: The christmas tree is visible from the dining room, but when Lewis goes beside it to smoke a cigar, you can't see him. When the tree is on fire, you don't see Lewis again and you can only see a branch of the tree.