Corrected entry: This happens after Han destroys the probe droid, during the Imperial montage that follows. In the shot right before you see the back of Vader's head, you see a wide shot of a Super Star Destroyer. Pay careful attention to the TIE fighter that flies in from off camera. Had the shot lasted for another second, it seems obvious that this fighter would've flown directly into the bottom of the Super Star Destroyer.
Corrected entry: When the Millennium Falcon is entering cloud city it files through the clouds without disturbing them at all. A ship that large would create vortices and wake turbulence in the clouds, or at least some movement as the air flowed round the ship.
Corrected entry: When Han, Leia and Chewbacca are taken captive, as the stormtroopers show up, watch the trooper in the middle of the first row. He loses his footing, and one of his feet slips on the floor. (01:25:05)
Corrected entry: There is only one Wampa in the film, although its appearance changes substantially between shots. The hand-puppet Wampa that roars at the camera and knocks Luke from his tauntaun is much bigger and has a different face structure than the one seen in the cave later (the full-body suit Wampa added in the Special Edition). When the Wampa charges at Luke, just before its arm is lopped off, it changes again - its horns are brown and much larger, and the face is completely different from either of the faces we've already seen. After losing its arm, the Wampa resumes its look from the Special Edition.
Corrected entry: When Luke is sucked through the window he isn't holding his lightsaber. Two shots later we see him clinging to the floor with both hands, and his lightsaber is nowhere to be seen on his belt. Since it was sucked out along with all the other debris, and had to be halfway down Cloud City by the time Luke hauled himself up, how did he recover it in order to continue his fight with Vader?
Corrected entry: The 2004 DVD edition had a different scene where Vader confronts the Emperor in the hologram (The Emperor is replaced by Ian McDiarmid) There a new point where the Emperor identifies the new Enemy as "The Son of Anakin Skywalker". What makes no sense is that Vader responds with "How is that possible?" yet he already knew the Identity of the "new enemy" well early into the movie, whats even more confusing is that he knew (following the events of Episode 3) that Padme had at least one baby.
Corrected entry: Near the end when Admiral Piett tells Vader the hyper drive on the Falcon is deactivated, look at Piett's chest insignia. At one point it is about 10 black medals, the shot changes from the side to show him from the front, and he has six blue medals. It goes back to show him at the side again and the black medals are back.
Corrected entry: In the Special Edition, when Luke is falling through Cloud City after the duel with Vader, a scream has been added. This scream was lifted from the Emperor's death scene in Return of the Jedi. When Vader tosses the Emperor down the reactor shaft, the Emperor's scream is exactly the same.