Factual error: In the scene in the glass elevator, when Mike Teavee wants to push a button, he presses the TV Room button. The elevator stops going down and immediately moves horizontally. The characters within the elevator are thrown against the wall from the sudden change. However, they are thrown against the wall that is in the direction the elevator is now moving, instead of the opposite wall as they should have been.
Factual error: In the scene where Wonka is flashing back to his childhood, he finds a chocolate that fell beneath the fire grate in the ash. He opens it and eats it unscathed. Knowing that chocolate can melt around even the slightest heat, there is no way the candy would have survived the heat from the fireplace being just inches away.
Factual error: In the scene where Augustus Gloop gets stuck in the pipe from the chocolate river, there are two shots that show the pressure in the pipe is too great and one of the seals of the pipe burst out some chocolate. This could not happen because the machine on the ceiling sucks the chocolate up. In order for the pressure to build up underneath Augustus for the seals to burst there would need to be a machine in the river pushing the chocolate up.