Revealing mistake: (Original theatrical release) When the imperial officer yells "Freeze", he is transparent and you can see the reactor through him.
Revealing mistake: In many far away shots of the sail barge you can see it is on a dune rather than in mid air.
Continuity mistake: In the Rancor pit, watch as the Rancor starts to pick up the pig guard. The Rancor starts to grab the pig guard with its left hand. But while being eaten the pig guard is held in the Rancor's right hand. (00:25:40)
Continuity mistake: Before Chewbacca and two Ewoks swing on a vine to the roof of one of the AT-ST walkers, in a shot of them running, Chewie's bandolier is on the wrong side.
Continuity mistake: When Boussh (Leia in disguise) is about to enter Jabba's throne room, there's a shot of Jabba where his arm is down by his side. In the next shot, on the left side of the screen, his arm is up by his head. (00:13:50)
Continuity mistake: In the sequence of the Emperor torturing Luke, there are several close-ups of Vader. Look at his helmet - it goes back and forth between being clean and being dusty.
Revealing mistake: When Luke jumps from Jabba's prisoner's skiff, you can see a stick supporting the "floating" skiff he jumps over to. (00:32:15)
Revealing mistake: When Luke is in his X-Wing preparing to make the jump to Dagobah, you can see the red text in the TV-type viewer in the cockpit has been superimposed as it remains stationary relative to the frame even when the cockpit is moving around.
Other mistake: When Vader first arrives at the station, he and the Commander are walking past rows of troops. If you look carefully, you will see a Stormtrooper in the back row with his helmet tipped so far forward it's almost off.
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.
Continuity mistake: The birthmark on Leia's back keeps changing sides during the 'Jabba' scenes. This seems to happen when Jabba's tail changes sides. I guess the model of him only went one way, so they flipped the negative.
Continuity mistake: When Vader's shuttle has landed inside the Death Star, behind the stormtroopers on the left side, there is a large structure. But when Vader and Jerjerrod, the Death Star commander, pass these stormtroopers, the structure is no longer there. (00:03:20 - 00:04:05)
Continuity mistake: On Endor, when the stormtroopers come to take Luke away, the door of the lift is heard opening, the stormtroopers are heard walking, and then they appear behind Luke three seconds after the door opened. But in the next shot, we can see that Luke and Vader are too far away from the lift for the stormtroopers to reach them that quickly.
Continuity mistake: When Luke confronts Jabba the Hutt, Jabba says to Bib Fortuna, "You weak-minded fool." In the next shot, Jabba's tail has switched position. (00:22:55)
Continuity mistake: When Luke removes Vader's mask, Anakin's eyebrows have been removed in the 2004 DVD. However, a part of his left eyebrow can still be seen in some shots, and it even changes size a few times. (01:55:50)
Suggested correction: It's not part of his eyebrow. It's a shadow.
Continuity mistake: When Leia wakes up in the woods, she sits straight up. In the next shot, she is still lying on the ground. This is best seen in the widescreen version. (01:00:25)
Revealing mistake: On Jabba's sail barge, Luke's hand is wounded before it is shot at.
Continuity mistake: When Leia knocks out a scout trooper with a branch after being discovered on Endor, she is turning to the right. In the next shot, she has turned the other way.
Revealing mistake: During the speeder bike chase, the speeders never cast any shadows on the ground.
Revealing mistake: When 3PO and R2 are being assigned to their droidly duties in Jabba's palace, there is a shot of a poor droid having hot irons branding his feet. The irons are never closer than an inch from the droid's feet, and the steam that allegedly comes from the burning is obviously being shot out of holes in the droid's feet.
