Crew or equipment visible: During the opening credits the shadow of the rig is clearly visible as the camera performs a 360 degree shot from the top of the "hill".
Crew or equipment visible: When the five new prisoners are ordered to empty their kits, a camera shadow is clearly visible passing over them on the left edge of the screen.
Crew or equipment visible: As Wilson confronts Roberts and King (at about the 90-minute mark), a camera shadow passes over a guard's back.
Continuity: When Ossie Davis strips to his shorts, the style of shorts changes from the time he leaves the cell block to the time he gets to the commandant's office.