Here's some ideas just to start with; if anyone's noticed more, please list them.
A New Hope
The Empire Strikes Back
Return of the Jedi
A New Hope
- The lid on the droids' escape pod is still blue in a few shots.
- Obi-Wan's introduction scene now features rocks in Artoo's hiding place for the close-up, which don't exist in the wider master shot.
- The red and white astro-droid reappears after it malfunctions, right next to R2-D2 at Owen Lars' farm.
- Luke's lightsaber blade needs to move out from the hilt in Obi-Wan's hut.
- Han needs to shoot Greedo first, or at least dodge the shot much more believably.
- The matte boxes around the TIE fighters during the Falcon escape are still visible in several shots.
The Empire Strikes Back
- The holographic Emperor needs another revision, to more closely match his appearance in "Return of the Jedi".
- Several shots inside Cloud City don't feature the revised widows, particularly when Vader first shows up to capture Han & Leia.
- Vader's lightsaber blade is still pink instead of red in several shots at the carbon-freeze chamber.
- Vader's blade also suddenly disappears between shots when he's talking to Luke at the Bespin balcony, after cutting his hand off.
Return of the Jedi
- The musical number from the Special Edition really doesn't work; it stops the whole narrative dead in its tracks.
- The matte painting behind Lando when he says goodbye to Han before the battle is painfully obvious.
- Leia remembering her mother needs editing, since Episode III changed the details of her birth.
- Some of the stop-motion Imperial walkers need CG replacements, because they look too pale against the green forest on Endor.
- The faded lightsabers still show up in a few places between Luke & Vader, with the white cores missing.
- Vader's first "no" needs to be either reduced in volume, or removed.