Plot hole: One of the flying dragons impacts the right outer engine of the B-29, and the fire spreads to the right inner engine. The crew lands the plane on the island, and the girls rebuild both engines, despite the fact there are no parts available on the island.
Continuity mistake: When the girls are having their PE lesson and Poppy is watching them practice their Lacrosse skills, Poppy gets some mud on her face, but in the next shot as she is putting sanitizer on, the splatter of mud is bigger and has changed shape. It is before she has touched it so it wouldn't have spread yet.
Factual error: In the film, Sgt. Jack Lupino is depicted as a United States Marine Corp Sargent. However, when Max is watching an interview with Lupino it shows him wearing either a Gunnery Sargent or Master Sargent chevrons. Not only that, but the chevrons happen to be upside down. No US Marine would ever make a mistake like that.
Factual error: When Chuck is stapling fliers to the telephone poles, the tree behind Vanessa has changed colors for Fall, but still has a lot of orange leaves. The scene takes place after Christmas. In Pittsburgh, PA, the leaves are long gone by December.
Continuity mistake: In the part when Lina and Doon are looking at The Book of Ember, they open it to a few pages in. But in a later shot, it shows they are near the middle of the book.
Factual error: The Moon is pushed into a "more elliptical" orbit. When the orbit it shown, it is more eccentric than the Moon's real orbit. However, it is centered directly on the Earth. This violates Kepler's first law of motion, which states that a natural satellite has the primary body at one focus of an elliptical orbit. In other words, the Moon should come much closer to the Earth at one end of the ellipse, and recede very far from it at the other end, rather than receding to the same distance in both directions.
Other mistake: When Meg Ryan is getting out of her black Lexus in front of her house (about 8 minutes into the movie), you can see that it is late in the afternoon by the shadows of the bushes and the trees being cast on the ground. However, she's rushing into the house to throw a 12:30 luncheon. If it were actually 12:30, the sun would be high in the sky and there would be very little shadows cast on the ground. (00:08:20)
Factual error: A woman is shown receiving electroshock treatment ("ECT") in a hospital scene which took place in 1928. Although chemicals were used to induce seizures in psychiatric treatments at the time, the use of electricity for the purpose was not discovered until 1937 and not used in the United States until 1940.
Continuity mistake: When Maya gets in the car to go to the White House, she's in a blue outfit, but is in a brown skirt and pink jacket when she gets there. Despite the fact she could've changed in the jet, she wouldn't have known she was going to be on a private jet, and so would've been wearing what she intended to wear. (00:13:00)
Continuity mistake: When Skeeter arrives at his sister Wendy's house, he walks into the kitchen and meets Patrick and Bobbi. He says he has some presents for Bobbi, and Patrick turns around and leans his arm on the back of the chair. In the next few shots his arms keeps moving from resting on the back of the chair to down in his lap.
Character mistake: On Taylor's phone it says she dies at 8:32PM, but Beth says 7:32PM, when reading the message. (00:27:05)
Plot hole: In the scene where Ba'al goes through the stargate and arrives in 1939, the event horizon from the stargate puts a hole in the haul of the ship. Later when SG1 goes through the stargate the hole is covered with ice. The event horizon created from SG1 would have been the same as the previous one and removed the ice from the hole.
Continuity mistake: Near the end, the tank's turret is seen turning. Camera does a quick cut and it's back to where it was before. Camera cuts and it's turning again.
Continuity mistake: When Dacyshyn drags Mulder by his legs and brings him to the shed, he goes past the tree stump with an axe embedded in it, but in the close-up of Mulder's torso there is some debris on the tree stump and the axe has disappeared, then the axe reappears still embedded in the wood. (01:31:10)
Factual error: The scene that takes place at the Ford release of their 1971 models has two Mustangs driving to the event. The one in front is obviously a 1973.
Revealing mistake: When Ami's chest is being drilled by the "drill-bra" at the end of the movie, you can see blood flowing from her chest, obviously because of the damage the drills are causing her. Yet, later, you can see absolutely no cuts or marks on her breasts or upper chest, where the drills were penetrating her skin. The skin is simply soaked with blood.
Factual error: All the soldiers that have rolled up sleeves have them rolled up Marine style (with the inside of the sleeve showing) despite being US Army.
Factual error: When we see the car John C Reilly is driving in, coming from Quebec, we see a license plate on the front of the car. Quebec does not have license plates on the front of its cars.
Factual error: There are Velcro straps holding the pads on the blocking sled, and there is an end zone goal post with one base. Both of these items did not exist until the late 60s.
Continuity mistake: When Nick and Bobby are playing craps in Rusty Nail's barn, Nick rolls "chest," resulting in Rusty branding Bobby with his R key chain. Rusty puts the red hot key chain in Bobby's shirt pocket and holds it against his chest. When Rusty lets go, you can see a hole has been burned into Bobby's shirt. The very next shot, Bobby is rolling the dice and his shirt is intact. Later on at the very end of the film, Bobby's shirt has the hole in the pocket again. (01:13:50 - 01:15:00)