Factual error: The tail livery on the Concorde was not current in 1992, being first introduced in 1997. The curvy grey interior seats shown in Concorde were only introduced gradually from 1993 onwards; the film should have depicted square seating in 1992.
Continuity mistake: When the bald soldier gets into the cage of the apes, the amount of mud on his face changes between shots.
Factual error: In a picture from the UN headquarters in New York in the year 2003 you see two German flags. The German Democrativ Republic hasn't existed since 1990. (01:16:04)
Continuity mistake: Gene and High Five are using costumes to hide, and Gene's costume leaves a spike in his face, but when they put the costumes down and run around the corner there is nothing on his face.
Factual error: When Mark Felt and the FBI Director are in a car on the way to the Watergate hearings in 1972 or 1973, from the car window, you see the WW2 memorial, which was built in 2004.
Continuity mistake: Laureline is not wearing a safety harness when talking to Valerian, but it appears and disappears several times as the shot cuts back and forth to Valerian. Laureline then puts on the safety harness she was already wearing.
Factual error: Throughout the whole movie, whenever federal agents (or people posing as such...) tasked with the case are shown, they wear uniforms with "U.S.A. Marshals" written in big yellow letters. Of course the one and only correct spelling would be "U.S. Marshal"
Continuity mistake: During the drunken gymnastics young Miss Langford is doing to the delight of the paparazzi, she is wearing transparent pantyhose for the most part of the scene; you can see it during the cartwheels with the panty shot, and with the feet close-up. However her legs and feet are bare when the camera shows a stuntwoman leaping over the gifts and crashing into the tree (probably they didn't want to tear the stockings with that landing). (00:02:30 - 00:03:55)
Continuity mistake: At the start of the song "Chillin' Like a Villain," Evie's shoes go from having high block heels to entirely different shorter wedge heels during the song. After the song, it's back to the high block heels. (00:38:20 - 00:39:40)
Other mistake: To stop herself from bleeding after removing the tree branch from her body, Jen heats the wrapper of a beer can and places it against the wound. Later it is revealed that doing this resulted in the logo being branded onto her skin. However, if the wrapper was placed on her skin and the logo was facing towards her, then the logo should have been mirrored, but it's not. (00:57:40 - 01:05:20)
Continuity mistake: When Mae and Ty meet, when Ty asks what does she think of this, Ty begins removing the lid from the bottle of wine he is holding, but in the next shot, the lid has suddenly been removed from the bottle, with his hand nowhere near it. (00:21:25)
Character mistake: It is highly unlikely that the recipient of Mr. Butler's application for the professorship position would not only call him so soon, but ask him to come to her office right away (where she would humiliate him for the things he wrote in his essay on "qualities that make me a good teacher"). Moreover, her failure to listen to Mr. Butler and give due consideration to his assertion that someone else actually wrote those offensive things showed poor judgment, especially since she knew the person who referred Mr. Butler and spoke highly of him. Someone tampering with his application would make more sense than believing that Mr. Butler actually wrote those things that criticized the very college he was applying to and boasted so much about himself. That Mr. Butler was not able to say more to make his point believable is also problematic. He is an English teacher, so should have the vocabulary and mastering of techniques to make a convincing argument, but he failed to defend himself.
Other mistake: Lady Bird isn't finished talking about the present when the camera switches to the boy but in that shot her mouth isn't moving. Plus, right before that half her face is blocked out which sort of hides her realization face reaction. (00:17:05)
Continuity mistake: During the opening scene with Ego and Quill's mother, they run into the woods behind the Dairy Queen, and mom is wearing boots with fur trim. When they get to where the Ego's plant is in the ground, she is suddenly wearing sandals.
Factual error: The American flag displayed when Churchill arrives at the big house to meet Eisenhower has a modern day configuration of 50 stars, not 48 as it was at the time.
Other mistake: Where did those spikes above and below the rear door come from? They exceed the height of the door.
Audio problem: When Rob starts accusing Benny of knowing what happened to him the previous night, Benny says that they just hung out and Rob says "Shut yo ass up" to Benny. The shot is focusing on Benny, with the camera behind Rob and his jaw does not move when he is saying the line. (00:56:20)
Other mistake: When Rodrick and Greg bought groceries, there was one bag of "Cheez Curlz" and it ended up in the hot tub at the motel. They weren't shown buying another bag yet they had one when the pigeons "attacked."
Other mistake: When Captain Underpants falls in the Turbo Toilet 2000's mouth which has a liquid in it, he doesn't turn into Mr. Krupp.
Factual error: The tubing scene was filmed at Nashoba Valley in Westford, MA. The scene looking down from the top of the tubing run has a banner with the name of the ski area and the "mountains" in the background scene are photoshopped in.