Other: Violet's clothes wouldn't be affected by the gum, but her clothes expand and turn blue.

Factual error: In the intro the chocolate wrapper states that the bar weighs 7 oz net, yet the boxes the bars are packaged in says 150g. 7oz is approximately 200g. (Time)

Factual error: During the Mike Teavee scene, the drummer is not even touching the hi-hat Mike is hanging onto thus he should not have been launched up in the air. (Time)

Continuity: The tire track of the rightmost truck (in the top-down shot) is completely wrong. All 5 of the trucks were parked parallel. Besides, we can see only one pair of tire tracks per truck, but when a truck turns, the path the front wheels move on has a larger radius than the one the back ones move on thus creating two tracks. All this was OK just a shot before. (Time)

Plot hole: In the end of the movie, when Willy Wonka decides to visit his father, his father does not recognize him until he looks at his "rare teeth." But the wall of newspaper printings that Charlie was looking at included a recent enough picture of Willy that the father would have definitely recognized him, before seeing his teeth, as Willy doesn't look like a normal person with that outfit.

Other: The mechanism that shoots the Gobstoppers into the pool is not connected to the pool. It's almost as if the mechanism is just floating there. Submitted by Brad

Continuity: When they show close-ups of Willy Wonka's face as an adult, you can see that he has bright blue eyes. But, when they show him as a child, he has dark, brown eyes.

Deliberate "mistake": Charlie's room has a hole big enough for him to climb out of in the ceiling. I know it is to show just how poor the family is, but we see he has only a thin wool blanket for warmth. He would have frozen to death in his sleep during winter by now. Submitted by Grumpy Scot