Corrected entry: When the Falcon leaves Hoth and is being chased by the Empire, there is a scene where the ship gets rocked about. During the 'impact', C-3PO's arm becomes dislodged, and you can clearly see human skin underneath. (00:36:20)
Corrected entry: After Luke's hand is cut off, he squeezes his forearm under his left armpit, and in the first shot of him clutching a pole, the knuckles of Mark Hamill's hand can be seen through his shirt, under his left arm. (01:46:00)
Correction: The first time I watched this, I thought so too, until I noticed that the distance between his right elbow and the supposed knuckles is far too big to be Mark Hamill's lower arm. What looks like the knuckles under his jacket are merely parts of his torn jacket; as you can see in several shots of this iconic scene, it got pretty damaged during the fight.
Corrected entry: Spaceships are partially transparent on occasion. An example: when the two Star Destroyers collide towards the end, one is visible through the other.
Correction: Star Destroyers never collide towards the end of this movie.
Corrected entry: In Cloud City, when Luke is shot at by the stormtroopers, you can see from the impacts that the walls are painted wood.
Correction: They're not on a ship, they're in the middle of a city. Why is it unreasonable that the walls would be made of wood?
Corrected entry: When Dak is flying his ship and talking to Luke, the background image is moving backwards, making it look like Dak is flying backwards.
Correction: Dak is not flying a ship, he is Luke's harpoon gunner and is facing backward. Luke even talks to him in the hangar before climbing into the snowspeeder.
Corrected entry: When the first transport ship leaves Hoth, it has a flat bottom. As it passes by the disabled Star Destroyer, the bottom is curved. (00:24:50)
Correction: The bottom of the ship curves inward to a flat base. Source https://pixels.com/featured/pp1056-vintage-black-star-wars-rebel-transport-patent-poster-cole-borders.html.
Corrected entry: In the Emperor's rewritten dialogue for the special edition in the holographic scene with Darth Vader, he tells Vader that "the young Jedi who destroyed the Death Star is the son of Anakin Skywalker," which draws disbelief from Vader - but earlier in the film Darth Vader said, "The rebels are there, and Skywalker is with them." In other words, he already knew who Luke is.
Correction: Vader has learned, courtesy of Imperial Intelligence, that the pilot who destroyed the Death Star is called Skywalker, a surname that, for all we know, may be a common one on Tatooine. It's quite a big leap between knowing the name and realising that this is actually his own son, as he believes that his child died with his mother before he could be born. Some disbelief on his part is entirely justifiable.
Also, according to issue 6 of the canon Marvel comic series "Star Wars: Darth Vader" from 2015, Vader learns the rebel pilot's name shortly after the events of the first Star Wars film. He immediately realises that Luke is his son and vows to recruit him and claim the Empire for his own. He keeps Luke's identity a secret from the Emperor, who does not find out until much later (this is revealed in the 2020 short story collection "From a Certain Point of View: The Empire Strikes Back").
Corrected entry: During the light sabre duel between Darth Vader and Luke Skywalker in Cloud City, Mickey Mouse's head can be seen on a display panel in the Reactor Control Room.
Corrected entry: If the Rebels had this large fleet of ships and fighters (as seen at the end of the film) then why wasn't this fleet there to defend the home base on Hoth against the imperial attack?
Correction: Those weren't battle ships. They were medical frigates, supply ships, etc. There were only a few x-wing fighters flying around. Wouldn't have been much of a fight against the empire.
Corrected entry: When Chewbacca roars at seeing Darth Vader in the banquet room at Cloud City, you can see two holes in Chewie's mouth that let Peter Mayhew breathe through the costume.
Correction: Unless we know enough about Wookie anatomy to know that they don't have what appears to be two holes in their mouths, then this mistake is invalid.
Corrected entry: In the original Empire Strikes Back Vader quotes "Bring my Shuttle." Which a lot of fans thought was better than "And let my Star Destroyer prepare for my arrival." In SE there is a scene with Vader walking towards his shuttle, which makes more sense. However the original didn't make any sense. The phrase "bring my shuttle" claims the shuttle isn't there at all, it's not waiting it's just not there. Unfortunately Vader beats the Falcon to the Star Destroyer which doesn't make sense. If the shuttle wasn't there already and bring it implies it wasn't waiting then how could Vader get there so fast. Logically if Vader planned to leave the city he wouldn't tell his shuttle to leave well before than, and the Falcon was picking up Luke and about to go outer space. So unless the shuttle was parked right next to the docking platform it doesn't makes sense on how he got to the destroyer first which is why it was changed in SE.
Correction: You assume Vader's shuttle is on the Star Destroyer and has to return to Cloud City to get to him. The shuttle could have been docked elsewhere in Cloud City and Vader was instructing his officers to bring it closer to his location.
Corrected entry: When Lando is talking to Han and Leia inside the cell, he says that Luke is on his way. How can Lando know this? He has never met Luke before, so he wouldn't know him or his X-wing. And, Luke can't be near the city until Han and the others are in the carbonite-freezing room (after Han is encased, an officer informs Darth Vader that Luke has landed).
Corrected entry: At the beginning of the film we see the probe droid crash to the surface of Hoth. The shot then changes to Luke on his tauntaun and we see the probe droid crash again.
Correction: The Empire has sent thousands of probes throughout the galaxy. The one Luke sees may not be the same as the first one. (Alternate correction: It's just the director showing the event from 2 perspectives. The first, a disorientating view of an ice planet. The second, our hero actually seeing the event and going to investigate).
Corrected entry: When Boba Fett leaves the garbage trail the garbage is spinning clockwise but when we see a close up and inside his ship the garbage is spinning anticlockwise.
Correction: There are a few pieces of space debris that are rotating in different directions (some clockwise & some anticlockwise). When they change views, this stays consistent. From inside his ship, you can see one piece rotating, but it's different than the other pieces you've already seen, so you can't say that it ever changed its rotation.
Corrected entry: When the meteorite hits the ground, just to the right you can see the footprints in the snow where they placed the charges.
Correction: The meteorite is shown hitting the ground from a distance. You can't see any prints in the snow, even when watching it in high quality Blu-ray.
Corrected entry: When Lando says "You're being put into carbon freeze" to Han, the words don't match his mouth movements.
Correction: Watch it more carefully. His lip movements do match. He's whispering to Han as to not be to loud, so you don't see his lips moving as much.
Corrected entry: During the attack of Hoth, Han Solo goes to the control room to see what's going on. A woman behind Leia pushes a button on a panel, and the entire panel bends.
Correction: So? The Rebellion has limited resources, their base is thrown together. They make do with all sorts of antiquated and damaged equipment.
Corrected entry: The view from a Star Destroyer bridge should show the main hull of the ship, all we see here is the vastness of space, even worse is the Super Star Destroyer which is massive in comparision.
Correction: The bridge of a Star Destroyer is placed substantially above the hull. We never get a good look out of the window, and the lack of visible hull could easily be due to the camera angle. We also don't know which way a particular window is looking at, it would be difficult to see the hull at all from side or rear windows at all.
Corrected entry: Every time the Millennium Falcon jumps into hyperspace, a lever on the console has to be pulled, as seen in this film and "Star Wars". But when Lando and Chewbacca attempt to jump to hyperspace right before R2-D2 repairs the hyperdrive, Chewbacca reaches up and hits two switches instead. No wonder it doesn't work. (01:51:55)
Correction: Must have been one of the repairs Lando's people made to the ship.
Corrected entry: When Luke is fighting Darth Vader and Luke gets sucked through the shattered window, just before the window breaks, Luke's lightsaber is on, and immediately after it is off without him having turned it off.
Correction: 1. Luke might have turned it off while the camera was focused on Vader. 2. At least once in the beginning of the same fight (in the Carbon Freezing chamber) Vader knocks Luke's saber from his hand and it turns off automatically. Either one could account for this.
Correction: The actor who played C-3PO, Anthony Daniels, wore a black body suit and hood under the costume, at no point was his 'human skin' visible.