Audio problem: When Charlie and Grandpa Joe are singing the "Golden Ticket" song, Grandpa Joe says, "Watch my speed!", but his mouth does not move to match the words.
Visible crew/equipment: When everybody first comes in the main room with the chocolate river, there is a shot of all of them standing in the doorway. At the bottom of the scene is the shadow of the camera.
Visible crew/equipment: In the Fizzy Lifting Drink scene, as Wonka leaves the room, a bubble machine is just visible at the bottom left of the screen.
Other mistake: During the glass elevator ride, first Joe points out their house can be seen but then when the area is shown on camera, no little house like theirs is in the shot. Next, Charlie says he sees his school, and again when the shot looks down below, no school at all is seen, but rather just streets that come together through a small tunnel and random houses.
Chosen answer: He felt that it took too many liberties with the story. In the original agreement, Dahl himself was to write the screenplay (he was, by that point, a not-unsuccessful screenwriter), only to find that his version of the script was subsequently heavily re-written, including what Dahl felt were a number of unnecessary gimmicks, such as Wonka's penchant for literary quotations. Even the title of the film was changed from the original "Charlie and the Chocolate Factory", in order to tie into the launch of the "Wonka Bar", a new candy bar made by the Quaker Oats company, who co-financed the film. Annoyed at all the changes, he ultimately disowned the film and refused to sell the cinematic rights to the sequel, "Charlie and the Great Glass Elevator".
Tailkinker ★