Factual error: Several times during the film a Zildjian stencil logo can be seen on the bottom of a cymbal. Zildjian did not start applying logos until the 1970's.

Continuity: After the band first plays at Villapiano's, the bartender lines up a row of bills in front of Steve Zahn. He then turns one $5 bill sideways, saying it's the band's bonus. When the scene cuts back and forth from the bartender's view to Steve Zahn's - the $5 bill appears and disappears a couple times as the point of view changes.

Factual error: When the boys go to the radio show in CA, the DJ says to the listeners to keep Saturday and Sunday, August 20th and 21st [1964] open. The 20th and 21st of August 1964 were a Thursday and a Friday.