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.
Continuity mistake: When Luke crashes on the snow he tries to open the cockpit pushing the canopy. A shot later he is pushing the windshield. This changes back and forth several times.
27th Nov 2022
Continuity mistake: After Luke's snowspeeder crashes on the snow, right before he exits, there's no damage on the right window. From the outside shot it's broken all over.