Continuity mistake: Near the beginning, when Ralphie runs from his house to catch up to Flick, on the way to school, notice that Flick is carrying a school book, which has a beige cover visible to the camera. In the next shot Schwartz joins the group from the very next house on the block, and within a time span of approximately two seconds, Flick's book cover has become blue in color. (00:13:50)
Continuity mistake: In the school classroom scene, the teacher writes "Silas" in cursive on the blackboard and very emphatically dots the "i" in Silas with her chalk. The dot is visible then and even in the long shot from the back of the classroom, however, in the next, more close-up shot, as the students are filing past her desk and handing in their fake buck teeth, there is no dot above the "i". (00:15:20)
Factual error: Ovaltine stopped sponsoring Little Orphan Annie in 1940, and there is a date of 1940 stamped on the decoder Ralphie got in the mail. The Wizard of Oz was released in 1939. The movie setting, therefore, would have to be 1940. The chattering teeth seen in Miss Shield's desk weren't invented until 1949. (00:15:55 - 00:33:50)jairodrigue
Continuity mistake: Looking out the classroom window, in the scene where the teacher has gone out to help free Flick's tongue from the flagpole, we see the fire truck has arrived and that a police car has just pulled in from the left and has stopped. The shot changes to show Ralphie saying "Oh no," and then another closer shot from outside, during which the police car is again pulling up at the very same spot. (00:19:05)
Continuity mistake: When Farkus grabs Schwartz and tries to make him say "uncle", the end of Schwartz's stocking cap is hanging loose in front of him. But in the following shot - showing Farkus throwing Schwartz to the ground - the end of the stocking cap is behind Schwartz's back. (00:23:00)Jeff Swanson
Other mistake: When the father "won" and he tells the family it was going to be sent "on tonight", he accidentally closes the door on one of the hound's ears. The dog starts moving up and down, which means the ear was thin enough to move around. If the ear was thin enough to move around, the dog could've just pulled itself out. (00:25:30 - 00:26:00)
Other mistake: When Ralphie and Flick are walking to school for the first time, they meet up with Schwartz, coming down the steps of his house which appears to be two houses down from Ralphie's. Later, when Ralphie is lying in bed after the soap in the mouth scene, the narrator (older Ralphie), states how "Three blocks away, Schwartz was getting his."Rob Meears
Visible crew/equipment: Towards the beginning of the movie when Ralphie's dad is in the basement fixing the furnace and the entire family is staring at the door, you need to keep an eye on the left side of the screen. There is a crewmember in the family room, who is on the screen by mistake. You don't see the person right away, but it is in that sequence when you see the mom in the shot, then you can see the leg of the person very quickly in the background.