Corrected entry: In the end where it zooms out and shows the Oompa Loompa narrator, you can see the machines used to shake the snow on the house.
Corrected entry: After all five kids find the golden tickets it's revealed they have to be at the factory on a specific date and time according to the ticket. So what would Wonka have done if all the tickets had not been found by that date? Keep in mind it is also revealed that the "Russian" ticket was a fake which was discovered just before Charlie found the actual remaining ticket. If he had not found that ticket or it was revealed that the Russian ticket was a fake after the specific date had come and passed there would have been only 4 ticket winners to arrive at the factory, so what would have Wonka done then?
Corrected entry: The FPS game Mike plays would set the movie no earlier than the mid 1990's, yet in the retrospection scene which is said to take place twenty years earlier, everything from cars to clothes is not younger than from 1950's, which would be about 40 years earlier.
Corrected entry: Violet's clothes wouldn't be affected by the gum, but her clothes expand and turn blue.
Corrected entry: Throughout the movie the size of the Oompa Loompa's varies in scenes, between shots where there are full sized characters, and in shots with no full sized characters.
Corrected entry: Willy is the only one that can verify the golden tickets, but we never see the Russian ticket rejected or the good tickets even looked at by him.
Corrected entry: At times it is obvious that the ship on the chocolate river is a model, given the rigidity of the people sitting on it (although computer sfx allows them to move) and given the droplets of the actual 'chocolate' water, which are too big.
Corrected entry: In the chocolate room, Willy Wonka exclaims that Oompah Loomphas are human / real people. He also states (when Augustus Gloop is eating chocolate,) that his chocolate isn't to be touched by human / real peoples' hand. So this means that the Oompah Loomphas are contaminating the chocolate by jumping in during their song. And by the look of the costumes they have for it, they do it often. (00:43:00 - 00:48:45)
Corrected entry: At the beginning of the movie several trucks park on the dry driveway of the chocolate factory to collect the Wonka Bars. It then snows. But when the trucks pull away, there is snow underneath where they were parked.
Corrected entry: Even though the Oompah Loompahs wore special swimwear, liquid chocolate from the river should have stuck to their faces and hands like it did with Augustus Gloop during the same scene.
Corrected entry: During the course of the film nobody's breath is EVER seen when exhaling, though it is wintertime, and clearly very cold. Though this is occasionally possible, this occurs for the duration of the film.
Corrected entry: The snow on the tires of the delivery vans sticks too well (you can see it rotate on the side of the tires) - a dead giveaway of sprayed on artificial snow.
Corrected entry: In the scene when Willy is with the chief Oompa Loompa and is eating the slug things, Willy Wonka sticks out his tongue and you can see the green dye has stained it from previous takes. Since we see his uncertainty and then revulsion, it's safe to assume that he's not eaten them before.