Visible crew/equipment: After Luke cuts Vader's hand, there's a shot of the Emperor walking downstairs. The shadow of the crew is visible on the lower left corner of the image. It can't be the shadow of Luke.
Visible crew/equipment: When the evil Superman flies into the junkyard, you can plainly see the wires from the harness. (01:26:00)
Visible crew/equipment: Right at the start of the film as the alien spacecraft is landing on the planet, you can see the scaffolding of the studio at the top of the screen.
Visible crew/equipment: As the priest is loading his luggage in the car, a large light is reflected in the quarter panel. It is not the sun, as that is ahead to our right while the light is behind us to the left. (00:51:20)