Continuity mistake: At the beginning when Chris and his band go to the concert, they are in the front standing next to the stage. However, when the camera cuts to show the entire audience, different people are standing where Chris and his band were. From that view, Chris and his band are not even in the audience.
Continuity mistake: There is a part in the movie where there are a montage of articles and photos of Chris "Izzy" Cole and Steel Dragon. If you look carefully at one of the articles supposedly about Izzy, you very plainly see the words "Limp Bizkit", a band which obviously came out after 1985.
Continuity mistake: When Chris and Emily are staring at the guitar in the glass case, from the front Emily has hair falling over her left shoulder. From the back/side view, however, all her hair is pushed back.
Continuity mistake: During Izzy's first concert, when he's singing his "power ballad," look which hand is holding the mic. In the closeups, it's his left hand, but in the wide shots, it's the right.
Continuity mistake: In the scene right after Izzy falls and gashes his face, after getting up in a daze and continuing the song, look in the background at Jason Bonham behind the drums. His hands are up in the air holding the drumsticks, yet at the exact time there is sound coming from the drums, as if he is tapping the snare.
Continuity mistake: The blood on Chris' face during the first concert is a disaster. First, about a second after he falls, there's a ton of blood. Then, a few minutes later, when there should be more blood, given that there's been more time for it to flow out, there's in fact less. When Chris goes into the wings to get it wiped off, there's just a little, but right when he returns to the stage, there's more than there was before he got cleaned up.
Continuity mistake: During Izzy's first concert with Steel Dragon, you can see that one of Kirk's guitar stings is broken. After Izzy sprays the audience with the fire hose, you can see that Kirk's broken string is replaced.
Continuity mistake: At the first concert at the factory Chris' father is standing next to the stage. However, when the camera cuts to show the entire audience, you can see Chris' dad now in the middle of the audience.