Factual error: In a scene that takes place in 1956 or 1957, Alicia Nash places an orange Tupperware container in the refrigerator. Although Tupperware first became very popular in the mid-50s, the particular model of Tupperware used in the film was not introduced until the late 60s or early 70s.
Factual error: The poem Ali quotes in the movie before the Frazier fight, "Ali comes out to meet Frazier, Frazier starts to retreat, If he goes back any further, He'll end up in a ringside seat..." was in fact the poem he used before the first Liston fight and began, "Clay comes out to meet Liston, Liston starts to retreat..." and ends with the lines, "Never did they think, When they laid down their money, That they would witness, The total eclipse of the Sonny". Poor effort.
Factual error: The year is 1969 when they steal the first aircraft (single engine Cessna), and there is a 757 taking off in the background. The 757 first flew on 02-19-82. (00:22:05)
Factual error: Philip uses his left hand to sign the decree declaring Joan officially crazy. No one in the 15th century would have used his left hand to write, as 1) it was considered the wrong hand to write with and 2) writing with the left hand would have smudged the fresh ink and rendered any document unreadable.
Other mistake: One of the shots of the aftermath of the battle is played in reverse - e.g. the smoke from the fires is going down. (01:41:20)
Continuity mistake: In the scene on the sidewalk where Bev is pretending Faye is her mom (and she's practicing to tell her mom that she's pregnant) the same people walk by several times. I don't think there was a single shot-reverse-shot sequence that had the right people walking by at the right time. You saw the same couple, for example, walk by at least four different times.
Plot hole: When John retrieves the mail from the postman, Iris dashes outside. Less than 10 seconds after she closes the door, a car is heard, off-camera, honking a horn. Wouldn't John have found Iris so soon after that noise is heard? She doesn't seem to have enough time to allow for a search for her.
Audio problem: In the scene in the beginning when the dance is going on, it shows John playing the trumpet. When he starts on his solo, there is s shot where it zooms in on the bell of the trumpet. During this shot you hear a single note being played and not changing. But if you look, you can see John moving his fingers on the valves.