Other mistake: It is crucial to the story that Peter is terrified of moths - but when he is led through the woods at knife point by Tracey, a large moth flies around both their heads for several seconds (lured by lights of the film crew) and he ignores it, being as it's an unplanned visitor. (00:42:30)
Audio problem: Right after Det. Corelli finds the limerick in her apartment, she pulls out her gun and there is a distinct sound of what's supposed to be her cocking the hammer on her pistol. However, Det. Corelli (along with all the other cops in the movie) uses a Glock semi-auto pistol, which does not have an external hammer that can be "cocked." The sound is added artificially, likely for dramatic effect. (01:06:30)
Factual error: In the scene when ADD is first leaving to go on tour, they drive past the Rock and Roll Hall of Fame and the bus driver announces, "On your left..." The shot of the museum as they drive by is the front. The road going by this way dead ends; there would be no way for them to get on the highway or a surface road. (Look on Google Maps. They are on East 9th Street going northwest.)
Factual error: At the end of the film, Wyatt and McQuarry each take a briefcase containing $5 million dollars. $1 million dollars in $100 dollar bills (highest denomination in circulation) weighs approximately 22lbs = 110lbs for $5 million. $5 million in $100 dollar bills is also approximately 3445 cu. in. in volume. This would not likely fit in the cases they are carrying, and would not be as easy to carry as they are.
Revealing mistake: While Punisher is killing Pittsy, you can tell he is holding a dummy, not the real girl.
Factual error: When Einstein is crossing a bridge on his way to the university, two German flags (black-red-gold) are flanking the bridge. The scene is set in 1914, so it should instead be the 'German Reichsflagge' which is black-white-red. Only after WW I, in August 1919, was the black-red-golden flag officially used to represent Germany. (00:38:50)
Continuity mistake: When Samir parks by 128 Randolph, he leaves the vehicle with the drivers side window down, but when the other agents pull up, the window is rolled up.
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.