Revealing mistake: When Fish goes flying off the van, the mat on which he lands is visible. (In subsequent shots, it is gone.). (00:06:55)
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.)
Continuity mistake: When the van stops and Fish's body is sent flying away, the position of his body on the ground differs between shots.
Continuity mistake: In the "playing bars" music montage scene, there is a shot where Fish and Curtis high five. It's a shot from their final concert that hasn't happened yet. Fish's hair is already short.
Other mistake: In the scene where ADD is playing Rock Band in the tour bus, the game continues to play by itself after Matt, Curtis and Amelia are interrupted by a phone call from their manager informing them that they will shoot a music video.
Continuity mistake: When ADD is getting ready to go back on stage after Vesuvius fails, the keyboardist doesn't have his hat on because he threw it into the crowd. Then, when they're shown playing after re-taking the stage, his hat is back on his head.
Continuity mistake: When ADD is playing their last song before Vesuvius takes the stage, the camera switches to a long shot and the lead singer is suddenly playing guitar left-handed (everything might be reversed, I only noticed the lead singer).
Continuity mistake: During the performance at the prom, when Fish is ruining the slow song by playing the drums at fast tempo, the black stripe on the back cymbal behind him keeps changing positions many times throughout the song.
Factual error: In the movie, A.D.D. is opening for Vesuvius' induction into the Rock and Roll Hall of Fame, after Vesuvius becoming famous 20 years ago. This is an error because you have to be famous for 25 years to be inducted, not 20.
Continuity mistake: When Fish is on top of the van and slides towards the windshield, his hand and the drumstick he holds are either against the windshield or away from it, depending on the angle.
Continuity mistake: When Fish is talking at the coffee place with Curtis, the glasses on the table keep moving around between shots.
Continuity mistake: While in the bus stop, Fish looks at the Rolling Stone magazine that a man is reading. The wide shots show the cover folded, but in the close-up it's straight.
