The "Golden Ticket" is placed on the back side (smooth side) of the chocolate bar before the wrapping, however, when opened, the Golden Ticket appears on the top side (the "printed side") of the bar.
In the nut sorting room, the tubes are filled with hazel nuts but when they come out of the tubes they are walnuts.
When the kids and their guardians are walking from the main gate to the front door, the shadow cast by the factory on the courtyard changes many times.
When Willy Wonka dips the pink ladle into the chocolate river, the chocolate is spilling over the edge of the ladle. But when he hands it to Charlie, the outside of the ladle is completely free of chocolate residue.
In the Nut Sorting Room, Veruca stands with her hands on the railing in front of her. There is a matched pair of shots over her shoulders where her hands are clearly visible. (The shots approximate to Willy Wonka's and Mr. Salt's points of view.) In the shot over Veruca's right shoulder, the gap at the side of the gate is clearly seen between her resting hands. In the reverse angle over her left shoulder the handrail is unbroken.
At the Tokyo candy store, several Wonka candy bars appear with Katakana print on the label. The title for the candy, "Nutty Crunch Surprise" is written out as "NATTI KURANCHI SA!RAIZU". The word "Surprise" is written out incorrectly as "SA!RAIZU" while it might be more properly written out as "SAPPARAIZU!".
When Augustus is trapped by a vacuum near the top of the pipe, the seals below him begin to blow out. A vacuum doesn't work that way, if he were blocking the pipe all the pressure would've been on the parts of the pipe between him and whatever was creating the vacuum.
When Mike Teavee pushes the "Television Room" button in the elevator, the elevator continues downward and then takes a sharp turn to the right. However, the actors lean toward the right (toward the direction the elevator moves), rather than moving to the left as one would as a reaction to the movement.
The cocoa bean pods in the jungle appear to be growing on twigs. In nature, they grow from thicker branches or trunks.
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 (198g).
Willy Wonka says he must keep his factory warm because the Oompa-Loompas hate the cold, but he later passes several of them on Fudge Mountain where it appears to be snowing and looks too cold. However, since fudge is produced using confectionery sugar (also commonly called powdered sugar) the snow is actually sugar, which is appropriate since soft snow ideal for skiing is called powder.
In the candy store where Charlie finds the Golden Ticket, a man offers to buy it from Charlie for $50, and then a woman offers Charlie $500. Some believe Charlie lives in England and the currency should be in pounds. However, the location was kept deliberately ambiguous by the producers, with some UK characteristics and some US characteristics. The bill Charlie uses to buy the candy has design elements of both US and British money.
When the news vans are outside the golden ticket winners' homes, the truck outside of Mike Teavee in Colorado has the wrong call letters. They start with the letter "W". They should start with "K" for a TV station west of the Mississippi. Also, the live truck in front of Violet's home in Atlanta has call letters beginning with a "K" instead of "W". While this is most often true, there are a few cases of call letters starting with "K" in the eastern US. Examples: Philadelphia's CBS station, KYW and in Pittsburgh, KDKA. One example of a station west of the Mississippi River that starts with a W is CBS affiliate WCCO in Minneapolis, Minnesota. (The river winds through both Minneapolis and St. Paul; the station is west and south of the river.)
In the "flag room", many of the flags appear to be mirrored or upside-down, but that's because they are flying in the opposite direction of the staff than we are used to.
When Augustus is drinking from the chocolate river, Wonka warns him that the chocolate must be untouched by human hands, but seems entirely unconcerned by the Oompa Loompas (which are close enough to humans) swimming in it. By this point, Augustus' presence has contaminated the river to the point where the additional presence doesn't matter, plus the Oompa Loompas are in presumably sterilized diving suits.
The adult Willy Wonka has blue eyes and the young Willy Wonka has dark brown eyes.
When Willy Wonka is eating a caterpillar for the first time ever, his tongue is already green.
During one of Willy's flashbacks as a child, he has braces which keep his lips from meeting, however his voice properly makes a "p" sound when he says words such as "pieces."
When Willy Wonka is having his shoes polished by Charlie, the crew is reflected in his black sunglasses.
As the sun comes up the morning after the flyers have been passed around the city, you can see an extra start to step out (then duck back in) of the doorway just beyond the flyered pole that is in the foreground.
After Willy Wonka walks into the glass elevator a second time, you can see the reflection of a crew member walking to the left.
When Mike Teavee is about to be transported through the air across to the television, the harness around his waist is visible just below his shirt as he is lifting up off the ground.
When Willy Wonka walks into the elevator after congratulating Charlie, he falls to the floor. In the reflection of the wobbling elevator door, you can see a crew member moving. The reflection is not of Charlie's grandpa.
Augustus' home town of Düsseldorf is shown to have old-fashioned houses with wooden frames, like in a Bavarian, Austrian or Swiss town. Düsseldorf is in Nordrhein-Westfalen, where there is no such architecture. Even more so, Düsseldorf is shown to be near a huge mountain range, of which there are none even remotely to the Ruhrgebiet, which is a rather flat landscape.
The photo in the 'Russian Ticket a Fake' article shows a group of people beside St. Basil's Cathedral in Moscow. However, the article text states that the boy who has "found" the Golden Ticket lives in St. Petersburg.
Considering that Willy Wonka made unmeltable ice cream, why didn't he make Prince Pondicherry's chocolate palace unmeltable as well?
At the beginning of the movie when it's lights out, Charlie sees the factory through a big hole in the house roof. He could have easily gotten hypothermia from the cold wintry night with a hole that big.
Mr. Salt could have easily jumped the gate if he had really wanted to save Veruca.
Mike Teavee says: "First off, there's a difference between waves and particles!". Actually there is not. All energy and matter express the so called wave-particle duality, where they can be regarded both as particles and as waves. Someone as science-oriented as Mike Teavee should be aware that this has been known since 1924. He most likely meant "There is a difference between energy and matter" which is much more relevant in this situation in that energy can easily be transmitted while matter cannot, which is what makes Willy Wonka's television camera so amazing.