Other mistake: When in the cave, Leia falls and is caught by Han. She tells him that "being held by you isn't quite enough to get me excited." As she is saying this you can see Harrison Ford mouthing her exact words. (00:44:05)
Other mistake: When the Star Destroyers are seen for the first time, in the second shot, some of the TIE fighters that fly over a Star Destroyer are transparent. (00:19:55)
Suggested correction: Just loaded up Disney+. I watched that scene - all the Tie Fighters are not transparent. What you're seeing is light set used to light up the Tie Fighters in space, to give the illusion that the Star Destroyer engines are shining on them.
Other mistake: In the original version, when the Rebel Transport ship leaves Hoth before the ion cannon is fired, an X-wing flies past it, and you can see the transport ship through one of its wings. This has been fixed in the Special Edition.
Other mistake: In the ending credits, Denis Lawson's name is misspelled "Dennis." The filmmakers made the same mistake in "Star Wars."
Suggested correction: And in the Star Wars corrections page, you will find that mistake with the explanation that Lawson has used both Denis and Dennis in his career.
Other mistake: When the Millennium Falcon escapes Hoth and is pursued by the Star Destroyers, frantic movements cause them to collide. Watch the interior shot of the Star Destroyer as everybody is thrown around. Near the bottom of the screen one of the computer consoles comes away from the wall and is hurridly pushed back into place by a controller! (00:35:55)
Other mistake: When the Falcon speeds away from Hoth just as Darth Vader steps out, watch carefully as the Falcon exits the hangar. You will notice that a very small spot of the Falcon is visible through the roof of the hangar as the Falcon exits and flies upwards.
Other mistake: After Vader cuts through a pillar with his lightsaber in the beginning of the duel, the hole in the pillar is much bigger than it should be. (01:37:35)
Other mistake: When the AT-AT (Imperial Walker) blasts the shield generator, when it explodes, you can see the glowing remains of it (only visible on widescreen DVD). It was fixed in the 2019 version.