Revealing mistake: Vader cuts off Luke's hand at the wrist. When Luke is holding on to the antennae-like assembly underneath Cloud City, in one shot, Mark Hamill bends his wrist, revealing the gimmick. (01:52:55)
Revealing mistake: When Leia and the crew return to cloud city to rescue Luke from the scaffolding, watch very closely as Lando ascends up the lift, just after the top hatch opens from the overhead angle, you will see that Lando has been replaced with a G.I. Joe look-alike figurine. (01:55:10)
Revealing mistake: When Luke and Leia are watching the Millennium Falcon leave at the end of the movie, its light goes through Luke's arm. (01:56:25)
Revealing mistake: When the medical droid tests Luke's mechanical hand at the end of the film, his thumb moves before the "muscle." (02:00:40)
Revealing mistake: When Luke and Vader are fighting in Cloud City, there is something looking like tape wherever they hit something with their lightsabers. Maybe it's pyrotechnic charges?
Revealing mistake: Right after Luke and Darth fight for the first time, Darth gets kicked off the Carbonite freezer. Then Luke jumps down to fight him again. After he jumps, you hear what sounds suspiciously like a trampoline. Then in the lower right screen, you can see Luke's head pop back up into frame. Widescreen Version only, although the sound is audible on the fullscreen version too.
Revealing mistake: In the original (not Special Edition): When the AT-ATs are attacking the Hoth base, they do a camera angle from inside Luke's cockpit. As his snowspeeder is passing through the legs of an AT-AT, part of the cockpit becomes translucent and you can slightly see the AT-AT through a metal bar.
Revealing mistake: In the shot where the Falcon is underneath the Star Destroyer, it is transparent and you can see the part of the Star Destroyer through it.
Revealing mistake: During the battle on Hoth, after Luke says: "Hobbie, you're still with me?", there's a shot of an AT-ST shooting at the rebel and after that, there a shot of an explosion behind them. You can see that the rebels are actually dummies in that shot.
Revealing mistake: During the escape from Cloud City, watch as C-3PO's head strikes a lamp on the hull of the Millennium Falcon. It bends out of shape.
Revealing mistake: Look carefully at the end of the cavern where the Millenium Falcon enters the giant asteroid. It's a dark blue circle, because the light is dim. But there is a little white circle on the right and the two circles are much brighter on the left side. It's because it's an image of a planet with a moon.
Revealing mistake: When we see the Star Destroyer for the first time, there are three of them on screen. The one on the top left, can still be seen even after another Star Destroyer came into frame and blocks the view.
Suggested correction: The Star Destroyer that blocks the other ones from view is transparent. It got fixed for the DVD.
Revealing mistake: When the Millenium Falcon fakes hitting the Star Destroyer, half of the sky is gray and the other half is black.
Revealing mistake: Two mistakes here: Before Darth Vader cuts Luke's hand, he cuts in half three columns. In the close-up, one can see that what held them together was a piece of wrinkled duct tape. In further shots, the tape disappears and only the scorched part of the column is visible.
Revealing mistake: When Han tricks the three Star Destroyers into running into each other, it cuts to the bridge crew of one destroyer being knocked around by the impact. You can see one of the officers in the 'trench' section (the lower level of the bridge) bump into one of the consoles and knock it askew, revealing it's actually a lightweight prop. For added humor, the officer that was sitting at said console then subtly tries to push it back into position before the scene cuts.
Revealing mistake: Han and Leia are arguing in the ice tunnels near the beginning. Han tells her she wants him to stay, and they stop and talk about it. Two people pass. Han moves back for the first person to come between them. The second alien-looking guy walks behind Han. His rubber mask gets caught on Han's right shoulder and bounces back into shape immediately.
