Other mistake: William Tillich (AKA Bill Tell) had one suitcase which could not possibly hold enough sheets (or thin blankets) to cover/wrap all the furniture in his motel room like he did. (His suitcase was not very large and also contained his clothes.) He covered an even larger area of furniture in Gordo's house. It isn't clear if he used his own sheets or just happened to find the same kind in Gordo's house.
Revealing mistake: In a sudden downpour, "rain" falls vertically, across a single line. (00:18:28 - 00:19:44)
Factual error: All Arabic texts in the film suffer from wrong directional rendering. Arabic is a right-to-left language. Its letters have different joined and disjoined forms. The film, however, has rendered Arabic texts from left to right in disjoined letters. These texts aren't semantically wrong, though. For example, deciphering the Arabic message at 0:40:45 point gives "أليس "التنين فنان؟ Translation: "Isn't the Dragon an artist?" The film has even adopted a good font for them.
Other mistake: "Boogie" was a HS student who didn't work and lived with his financially strained (heavily in debt) parents. The Chin family was receiving past-due notices for various bills. The IRS also sent a letter of intent to levy or seize their property if they did not immediately pay $4,513.29. But Boogie had money to buy marijuana, go out to dinner with his girlfriend, go to a gym, and visit a fortune teller - each multiple times. His mother also ate out and saw a fortune teller. With what money? (00:10:20 - 00:28:57)
Continuity mistake: David's [Ralph Fiennes] glass on the table is filled to within about 1" from the top. When he raises the glass to his mouth, the amount is about 1" lower, which may explain why the lemon slice is now floating diagonally instead of vertically. (00:01:36)
Other mistake: When Zoe Levenson first looks out the window from the spaceship, the earth is from the bottom moving towards the top, this is opposite to the ship spinning direction, which can be determined by the direction of the gravity. (00:12:50)
Deliberate mistake: The view looking out the windshield showed the man on the bicycle had stopped when he was in front of the car's passenger side, but the outside view showed the man still coming to a stop and then tilting his bicycle. (00:07:12)
Factual error: The crow (mechanical at least in part) perching atop the dead tree lacked some details/behaviors that would've been displayed by a real crow. Its tail should have been thinner and longer (not short and wide, although they do fan). It would have repeatedly cawed upon noticing Geary and Fenn approaching to alert family members of potential danger. It would not have straightened its head to watch the men; the dominant eye would be used to see better (monocular vision is better than binocular). (00:04:40)
Continuity mistake: The appearance of young JR's hair has many inconsistencies. For example, JR's parted bangs (on the left) are long enough to hang part-way into his right eyebrow while he is walking toward the bedroom, but his bangs are well above his eyebrow when he is standing in the bedroom doorway. When JR is in bed that night, his bangs are separated along the right side of his forehead, but neatly combed together (no gaps) after a camera shift and contrary to gravity. (00:05:10)
Other mistake: The chances that no-one in the approaching truck - three men, including a man standing in the bed facing oncoming traffic - would notice that Danny had a front seat passenger are very low, if not zero. Even after Motley got into the second row seat of the truck, but did not get down right away, the men in the truck had turned around and were following Danny but still did not notice Motley. (00:10:00 - 00:10:27)
Continuity mistake: Before Jen gets on the yacht, Aileen's green halter strap can be seen because the left side of her hair is on or over her shoulder. When Jen gets on board, Aileen's hair is in front, covering up the green strap. The camera shifts when Lewis is hugging Jen and Aileen's green strap is visible again with the left side of her hair behind her. There is no noticeable wind and Eileen is standing in the same place. (00:32:10)
Factual error: Unless left in the vehicle (not the case here), towed impounded vehicles do not have keys. Moreover, lacking keys, a valid registration, possibly proof of insurance, and new plates, vehicles bought at a NYPD auction are to be TOWED away. A newly-purchased auctioned vehicle, such as the Navigator in the movie, is "ticket-" or "citation-ready", not ready to be driven on the streets.
Continuity mistake: Finley carried her violin and one square suitcase out of her room to go to her audition. Sean parked at Dublin Airport and removed Finley's luggage from his trunk - two rectangular suitcases, neither matching the one Finley had. (01:44:25 - 01:45:21)
Continuity mistake: The way Franck's scarf was wrapped and tied around his neck changed from when he was sitting on the steps (wrapped around a few times with ends folded under) to when he was standing along the guard rail (a loop down the middle of his chest). (00:15:09)
Factual error: At the end of the film, Hellfire Jack returns the toy soldier to the son of the late William Hawkins in 1917. Hawkins son is shown taking it upstairs and placing it in front of a photo of his father, in between two medals. These are the British War and Victory Medals - these did not exist until 1919, and in most cases were not even issued until the 1920's.
Continuity mistake: Bernard took at least three swigs from his shot glass of whiskey yet the level of the whiskey stayed about the same (half full). (00:07:10 - 00:10:23)
Character mistake: Over the phone, Julie told her sister Sara, " I got them [parents] a bouquet", pronouncing the "T" in bouquet. Bouquet has French origin so the "T" is silent. Bouquet is properly pronounced like bow-kay (American English) or boo-kay (British English). (00:00:55)
Factual error: The advertising boards on the upper level of the arena for Delta Airlines and United Airlines are anachronistic for 1999. The logo for Delta did not take that form until 2007, and the logo for United did not take that form until their merger with Continental Airlines in 2010.
Deliberate mistake: Evie digs a box out of the greenhouse dirt, but no dirt falls off the box, and the box is clean when she moves it onto her lap. (00:09:00)
Factual error: Sassoon's Military Cross medal is shown ending up thrown in the Mersey and sinking. In his own words from "Memoirs of an Infantry Officer", published in 1930 - "I ripped the MC ribbon off my tunic and threw it into the mouth of the Mersey. Weighted with significance though this action was, it would have felt more conclusive had the ribbons been heavier. As it was, the poor little thing fell weakly on the water and floated away as though aware of its own futility."