Continuity mistake: When Lisa and Dave are talking to Mr. James in Dave's office, the phone cord is hanging off the desk. Except in one shot, it is completely on the desk.
Continuity mistake: When everyone is in the bathroom talking to Matthew about his mustache the camera is on him, and Beth can be seen moving her hands. The shot changes to showing everyone and her hands are down at her side, not moving.
Continuity mistake: At the beginning of the episode when they are talking about last year's Halloween party and what Matthew went as the number of pencils in the cup changes from 3 to 4, then back to 3.
Revealing mistake: When Matthew is sliding backwards because his shoes are icy, just before he falls you can see the board he was on to allow him to move backwards. (00:02:00)
Visible crew/equipment: When Dave is walking out of the office to the elevator to talk to Joe the studio lights can be seen. (00:05:45)
Continuity mistake: When Catherine sits down at the break room table Beth is seen walking out of the door twice.
Continuity mistake: Jimmy is talking to Beth about stocks. Bill is seen opening the door to the booth, the shot changes and he is already in the booth. (00:13:30)
Continuity mistake: When Bill is asking Beth to help with the audition tape she is holding a cereal box. The way she is holding the box changes multiple times.
Continuity mistake: When Bill and Beth are doing the audition there is a cereal box on the counter. The back is facing the camera the shot changes the front is now facing the camera.
The Trainer - S3-E11
Continuity mistake: When Lisa walks into Dave's office and says "You Canadian?" One of Dave's hands is at his ear, the shot changes and his hand is now at his side.
Continuity mistake: When Jimmy Dave and Joe are in the break room Jimmy stands up, the shot changes he is sitting down, the shot changes again he is standing up. (00:05:40)
Visible crew/equipment: When Beth is at the casino a boom mic is visible. (00:19:40)
Visible crew/equipment: When Catherine and Dave are at the mental institution Bill is at the window. Dave walks up to the window and the edge of the set wall can be seen.
Continuity mistake: For this episode only the light switch in the break room is a dimming switch rather the the normal ON/OFF switch.