Factual error: When Suzanna and Lisa are at Daisy's house, Daisy lays out money for Lisa so that she can get pancakes, and the bill she laid down is one of the new bills. This movie is set in the 60s so of course they wouldn't have the new bills, considering they didn't start making them until 1998.
Revealing mistake: In the David Letterman scenes, Paul Schaeffer's head is shaved, which he just did recently (maybe within the last year to year and a half). (01:15:00)
Revealing mistake: When Homer placed the rocket on his fence and lit it his friend asked "Should we get behind somethin'?" That's when the rocket explodes. When you see them fly back you don't need to slow motion it because you can clearly see the wires attached to their backs.
Continuity mistake: At one point about three-quarters of the way through the movie, when Lowell Bergman (Al Pacino) and Don Hewitt (Philip Baker Hall) are talking, watch in the background as a certain lady walks past after Don says something. When we cut back to him he says something else, but the same woman in the background appears and walks exactly in the same direction, just like in the previous cut. (01:52:35)
Visible crew/equipment: While young Joan is lying in the field next to the sword, in the far right corner you can see a pair of legs and a camera lens pointed at the actress. (00:06:35)
Factual error: Joan's brother Pierre did not die at the fight at Paris. He actually outlived her and testified at her Trial of Rehabilitation.
Audio problem: Towards the end when Rubin Carter is in court, there are numerous occasions when you can hear the courtroom observers talking and whispering to each other. In the camera shots of the observers, there is not one person that is visibly talking.
Continuity mistake: When Roberta is in Brian's apartment, she is putting curlers in her hair and then Brian walks in and they start talking. Roberta then stands up and Brian kisses her neck and as she turns around you can see the curlers have disappeared.
Visible crew/equipment: At the end when Ella Fitzgerald is singing "When the Saints come Marching in", a camera shadow briefly passes over her right arm.
Deliberate mistake: This is being made as more of a movie than a documentary as it is using actors to portray Jesse Ventura and other wrestlers (like The Superstar Billy Graham). Needless to say because TBS is making the film, WCW Monday Nitro and Thunder were used to film the matches. As a result the rings contain logos for those events (neither the events nor the logos existed in Ventura's days as a wrestler). In addition the ring announcer is using a cordless microphone which was definitely not in use when Ventura fought the Superstar.
Factual error: One of the operetta excerpts shown in the movie is the humorous song "This Helmet I Suppose," during which Princess Ida's three brothers are supposed to remove their armor piece by piece, finding it heavy, hot and awkward. Partly as a result of this, the three are soon afterwards quickly and easily defeated in combat. In the film, however, only Arac, the brother singing the verses (played by Richard Temple (played by Timothy Spall)), removes his armor. The others simply stand still. (This might have made the battle scene end differently if it was shown on screen!)
Factual error: In one scene Alvin is driving over a bridge on the Mississippi. He is going in to Prarie Du Chine but the bridge is in a different town, and he is going from east to west not west to east. The town he is driving into is Lansing, Iowa.
Other mistake: Louella Parsons walks out of a screening of Citizen Kane before it ends, but later tells Hearst that Rosebud was Kane's sled. She shouldn't know that, because the identity of Rosebud is only revealed in the final scene of the movie. And if she disliked the movie enough to walk out on it, it's improbable she went to see it a second time.