Continuity: When Clark is holding the gutter, it bends and ice is thrown from inside of it. The problem is that you can't see any ice during the first shot when it bends, and also that the ice goes in the wrong direction.

Revealing: When Clark starts to set up his Christmas lights, there is a scene where the ladder collapses. If you look closely you can see the wire coming out from under his jacket to keep him from falling forward.

Other: When Clarke is on the sled, there's one frontal shot when the snow flies in the air before he touches it.

Revealing: When Eddie leaves Frank's mansion, the "snow" wiggles on the driveway.

Continuity: In the shot where it shows Lewis on fire, you can see it's not William Hickey, but a "younger" stuntman.

Factual error: When the Griswold family are going to buy a christmas tree, they are in the mountains. There are no mountains in the Midwest.

Continuity: At the end of the movie, when Clarke is outside of the house with Eddie's dog, all the police cars have disappeared.

Continuity: When all the family is outside to see the christmas lights, there is an aerial shot of them. Clarke starts to say "Joy to the world" before you actually hear him say it.

Continuity: When Clark finally opens the christmas lights, he has the wires in his hands. The shot later, when all the family comes, the wires are not there and his arms are wide open.

Visible crew/equipment: When Clarke is on his sled, just before he crashes into the cabin, the shadow of the camera is visible on it.

Continuity: At the beginning of the movie, the Griswold family makes marks in the snow when they arrive at the tree which Clarke wants. A shot later, the marks are bigger even though they haven't moved.

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: When Clark is outside hanging the lights, he staples the sleeve of his shirt, under his wrist, to the eaves of the house. In the next shot, as he is pulling, the shirt is stapled over his wrist.

Revealing: When Clarke notices that Lewis has caught on fire, he's only burning when he pushes him on the ground.

Continuity: In the scene where Eddie and Clark are drinking egg nog, Eddie knocks down the decoration with propellers on it. When Eddie walks to the table with the nuts on it the camera shots cut from Eddie to Clark attempting to fix the decoration. In each shot that we go back to Clark, the number of propellers left on the deocoration change even after Clark has given up fixing it.

Revealing: In the scene where Lewis's coat catches on fire after the Christmas tree explodes, the square on his coat that holds the "fire" is evident.

Revealing: Leaves can be seen on several trees around the Griswold house, which is supposed to be in Chicago and its obviously supposed to be wintertime.

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

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.