Passepartout sits at a table in a San Francisco saloon. Someone throws a knife, which lands on the table next to his hand and knocks over a glass of beer. In the next shot, the glass is upright and full of beer.
When the American train stops unexpectedly, for the pow-wow with the Indians, and later, when the buffalo are stampeding across the tracks, the locomotive is behind the same cluster of bushes. Incidentally, the railroad would never allow foliage to grow that close to the right-of-way. They would cut it back, to avoid track fires caused by stray embers dropped from the engine.
When Inspector Fix and Passepartout are in the bar sitting down and talking, the inspector's left hand is on top of his walking stick, with his right hand on top of his left. A moment later, his hands are reversed.
When the SS Rangoon approaches Bangkok, its hull is white. As the evening progresses, while Phileas Fogg impresses Princess Aouda with tales of his prowess at Whist, the hull is black in brief closeup scenes. A long shot of the Rangoon as it enters Hong Kong harbor reveals a black hull.
When Passepartout tries to escape the Sioux on horseback, his horse leaves a trail of dust. The dust pattern changes completely at one point, revealing 2 scenes spliced together. A large rock in the background provides a shadow to fully observe it.
The locomotive used for the American train sequence is named the Jupiter, one of the locomotives at the Golden Spike ceremony. However it's a 2-8-2 freight engine with small drive wheels. The real Jupiter was a 4-4-0 passenger locomotive with large drivers. The locomotive in the movie is powerful but slow, and would never have been used to pull a passenger train on the prairie.
As Fogg and Passepartout prepare to leave Paris in the balloon, the basket is on the ground and a rope extends about eight feet to the side of the basket, where it is tied to a pile of sandbags to keep it down. When Passepartout unties the rope the balloon begins to rise. If the rope had actually been holding the balloon down, it would have be vertical and taut because the balloon would be above it.
As Passpartout and Fogg's balloon flies over the mountains, a pigeon flutters by. Pigeons do not fly that high.
When the RMS Mongolia leave Suez, sailors are climbing up the masts of a high tall ship. When the Mongolia is shown, it's a low rigged steamship.
When Fogg and Passepartout cross the mountains in the balloon at high altitude, both are wearing light clothing and no gloves when opening the champagne. The air temperature around them would have been freezing, yet they show no signs of being cold.
In all close-up scenes with the gas balloon the basket ropes are tight from the load ring and down, but from the load ring and up to the balloon they are slack. Had it been a real flying gas balloon, all the ropes and the net above the load ring would have been very tight during flight, since they are carrying the weight of the basket and everything in it. The lifting force, a stage crane, is erroneously placed in the center through the appending gas valve. If the sandbags on the basket actually contained sand, they would not have bounced around so lightly.
When Passepartout is attacked by Indians, on top of the train, the rubber arrows bounce off him.
In the saloon, when the cigar salesman takes a swing at Fogg, he misses Fogg and Fix, yet Fix reels anyway.
When Fogg, and Passepartout travel in the balloon, the streamers at the bottom of the basket flutter behind them. A balloon moves with the wind, so streamers tend to hang straight down or flutter randomly in the turbulence.
When Passpartout is on the roof of the train during the Indian attack he is struck by two arrows that just bounce off, revealing they are simply sticks with no arrowheads.
When the Native Americans attack the train, Buster Keaton makes a common mistake, saying that the Indians must have gotten the engineer and fireman, but they'll get out of the mess because the "calvary" is ahead. Calvary is a religious site, cavalry is a mounted army unit.
While at Thomas Cook & Sons in Paris, Charles Boyer (as the travel agent) is telling Cantinflas (Passepartout) about the places to be visited on the journey. The brochure Boyer holds is the same on both sides, despite the names of many other places being mentioned as he flips the brochure from front to back.
In San Francisco the prostitutes jump off a wagon full of beer barrels marked 'Pabst Blue Ribbon.' It was called Select until 1882. Due to their practice of tying a blue ribbon around the neck, it was frequently asked for as 'that blue ribbon beer.'
In 1872, the American flag at the Fort Kearney station would've had 37 stars. Colorado became the 38th state in 1877.
Fogg may have realized traveling east (toward the sun) gained him a day--but this film has him then saying they crossed the "International Date Line". A familiar fact to audiences in 1956, but not to travelers in 1872, since the IDL wasn't established till 1884.
When the tall ship US Grant arrives in San Francisco, radar installations are on the mast. It's actually a stock shot of the Nippon Maru, a 1950s Japanese training ship.
Paris' Gare du Nord is blackened by decades of street traffic, Paris chimneys, and steam engines. In 1872, Gare du Nord had just been built.
The music in the saloon does not match what the pianist plays.
In an early scene with Passpartout riding his bicycle, someone yells "Get out of the way!" at him, yet neither the cab driver nor the passenger leaning out the window's lips are moving.
In the bullfighting sequence, when the two trumpeters get up to signal the entrance of the bull into the ring, the sound of the fanfare starts just before they actually put the instruments to their lips.
The shadow of the camera crane is visible in the street during the San Francisco parade.
Near the end of the movie just after they start cutting up the Henriette for firewood in the middle of the ocean, a long shot shows some type of structure, possibly a camera platform, to the rear of the ship, screen left, sitting in the water.
During the Engineer's pow wow with the Indians a modern ladder is clearly visible leaning on the front of the locomotive.
The scenes set in Yokohama, Japan, were shot in Kamakura, west of Yokohama, and Kyoto, far southwest of Yokohama. The film makes Kamakura's Great Buddha look like it's walking distance from Kyoto's Heian Shrine, but they are in separate regions of Japan.
As the train travels east across India, Passepartout looks out the window at the setting sun. The sun would have been to the west, at the rear of the train, not north, the direction from the window.
As Phileas Fogg and Passepartout arrive in India aboard the Mongolia, several traditional fishing boats are seen pulling into port. One of those boats is clearly flying the flag of Pakistan, not India.
At the beginning of the movie, in London, carriages drive on the right side and travel roundabouts in a counter-clockwise direction. The UK drives on the left.
Near the end of the movie, the Henrietta is traveling east to England across the Atlantic, yet the ship heads into the setting sun.
The premise of Inspector Fix is that Phileas Fogg had just robbed a bank and made a quick escape from the country, ultimately arresting Fogg upon his return to England before discovering that the real culprit had already been caught in the interim. It is never explained that if this was the case, then why was Fogg is such a rush to get back to England, despite the Inspector shadowing and even joining in his party nearly every step of the way.
Having heard that Fogg is on a ship bound for Caracas, Venezuela, one character then said Fogg was on his way to Central America. Venezuela is in South America.
Fogg doesn't realise until arriving back home in London that he has gained a day by crossing the date line. Surely during everything that happened after that, including all the USA scenes, he would have noted local time as it was crucial to the whole challenge . And surely any tickets purchased would have been dated.
Passepartout is French, yet early in the film he responds to the Englishman Fogg with the Spanish "Si, señor."