Continuity mistake: Eddie drives a 1957 Chevy convertible off the bridge. A scene showing the car being fished out of the water clearly has an older vehicle dangling from the line.
Suggested correction: The car pulled onto the bridge is absolutely a 1957 Chevrolet convertible.
Continuity mistake: When Alex sits down to watch the news, the various items around the TV, magazines on the table, the cushions, cups, items on the couch etc. differ in position during the scene. (00:11:35)
Continuity mistake: When Cheech gets off the stage in the beginning of the final show, you can see the spotlights on him when he is walking towards the curtains. When it cuts to a wide shot Cheech is gone and the spotlight is off. (01:04:25)
Visible crew/equipment: During the scene where Nick and Sam come upon Richard having a midnight snack in the kitchen you can see a small bright whitish reflection of some kind of equipment in the top left (our left) kitchen window, down in the lower right corner. There is no character movement or other scene related explanation for this reflection. It moves and fades during the scene, most dramatically at the end of the scene. (00:37:20)
Continuity mistake: When Tony is trying out for the second show, he is shown wearing number 46. There is one shot of him wearing number 40, which was his number for the first tryout.