Factual error: In the discussion between Sergeant O'Malley and Chaz, Chaz says "All i want is a lousy 3 minutes and 31 seconds of Airplay, to air his song. Even though the real song used which is definitely exactly the same as the one on the tape goes for 3 minutes and 51 seconds. 20 seconds longer than Chaz says it is.
Factual error: When The Lone Rangers are playing in jail at the end, Rex the bass player and Chaz are in the wrong music keys for the riff they're "playing" and Pip is hitting the wrong cymbals and drums. Rex was all the way in 17th 18th on D, when hes meant to be on 1st 4th on the E and 5th 6th and 8th on the A, during the solo. (01:27:15)