The fire brand not fully connecting with the droid's feet and the steam jet being off in Jabba's Palace.
Background of Droid's feet being lifted onto the skiff isn't at all convincing. It looks like what it is, a painted board a few feet away.
While not a true error, more a limitation... it would be nice if Max Reebo's fingers could actually move properly in time onto the piano keys along with the tune he's playing.
Another 'limitation'... make the Gamorian Guard's fingers move properly.
Sort that tentacle out that grabs Threepio. Daniels does his best with it mime wise.
Ewok eye beads being missing in the back of a couple shots.
Cab of the AT-ST that gets crushed between two logs feels empty. A more suitable explosion is needed.
Animated smoke from burning Cab of the AT-ST that Chewie blows up isn't that great.
Lando's voice echoing when he says the "That was too close" line.