As "The Lone Rangers" take stage near the end of the movie a point is made that the stage equipment are non-functional props. Yet after Chaz refuses to play Ian grabs and shouts into a "prop" microphone.
When Beech initially goes through the air vent in the ceiling looking for a cell phone it shows the top of the desk with the cell phone there, a Rolodex card falls next to the cell phone. The camera then pans back to Beech who looks around, then the camera pans back to the top of the desk where the cell phone is showing, however the Rolodex card is no longer there.
The sign outside of the station lists the broadcast frequency as 103.6. FM radio stations in America always use odd numbers for their broadcast frequencies. However, like the infamous '555' telephone exchange, this is deliberate use of fictitious numbering.
When Chaz infiltrates Palatine records and has his conversation with Jimmy, Wing never introduces himself, nor does anyone else use his name. How does Chaz know the name of the man he met when ranting about the music industry on the air?
In the last scene when the band is trashing the stage and instruments, Chaz pretends to smash a PRS guitar, actually just slowing his swing to not hit the full stack guitar amp, only pretending to smash it.