Corrected entry: After Anakin gets his arms and legs mutilated by Kenobi, he is transported to a facility to adapt the bionic parts to him. Amidala is delivering the twins about the same time. It's obviously all for the sake of drama, but it makes absolutely no sense that a society so technologically developed as to have invented hyperspace jumping, had not invented a simple glass cover, or even an umbrella to shield Anakin from the rain while transporting him, nor painkillers or a way to sedate him through the medical procedure. Amidala is delivering the old-fashioned way, so apparently they haven't invented cesarea either. This is unacceptable, even for our universe.
Corrected entry: The final scene of the movie shows Vader and the Emperor looking out at the Death Star being constructed. This doesn't fit with the storyline as there is almost 20 years between episodes 3 & 4, that is quite a slow construction. Compare this to the time in which the second and more powerful death star is almost finished. Some time could be accounted for through prototype versions and testing, but not 20 years.
Corrected entry: Just before Obi-Wan and Anakin begin their duel, Obi-Wan says "I will do what I must." and removes his lightsaber from his belt. As he is raising his arm above his head he "flicks" the lightsaber hilt as if he has just activated it. Anakin then says "You will try", and Obi-Wan then activates his lightsaber. Obviously it was decided that Obi-Wan should wait until after Anakin delivers his line for Obi-Wan to activate his lightsaber and the timing was simply switched, leaving an awkwardly long time for Obi-Wan to stand there holding a lightsaber in the air that isn't turned on.
Corrected entry: General Grievous, whose two arms can split into four, has a total of twelve fingers (six on each hand when his arms aren't split). However in some shots (such as when he orders his ship's bridge crew to fire the emergency booster engines in an early scene) we can see he has five on each hand when his arms aren't split. In other shots, he has the correct number of fingers.
Corrected entry: When Palpatine, Anakin, and Obi-Wan are in the elevator tracks, they jump from the elevator coming down, shoot out a grappling hook then they all go through the door onto the floor of the hallway. They all go in at an odd pace. Palpatine gets thrown into the hallway first, then Obi-Wan and Anakin. But really they should all be getting thrown in at the same time, since only Anakin and Obi-Wan have the grappling hooks and Palpatine is holding onto Anakin's leg, which he should be influenced by him, and get thrown at the same time.
Corrected entry: During the battle between Sidious and the 4 Jedi, just after Sidious kills Tiin(the second Jedi he kills), you can see something in the bottom of the image, crossing from left to right that looks like the head of a crew man. (01:11:30)
Corrected entry: At the beginning, when Anakin and Kenobi rescue Palpatine, the two Jedi ride an elevator to the "top of the control spire" to find Palpatine. However, when they leave this room (when the ship is tipping or falling out of the sky), they climb into an empty lift tube and start running down it. After the ship rights itself and the 3 are hanging, an elevator begins plummeting towards them. Where did this elevator come from? They came from the top of the spire, i.e. the top floor, so how did they end up with an elevator being above them?
Corrected entry: In the scene where Zett Jukassa (the young padawan) saves Bail Organa from the clones, he kills 3 clones, but when he goes to kill the fourth, the clone flies back before the lightsabre hits him. This is better seen in slow motion. (01:21:30)
Corrected entry: When Beru is showing the baby (Luke) to Owen, in the shot facing them, Owen straightens almost fully up. In the beginning of the next shot, he's still crouching, but he's crouched down more than in the previous shot, best seen from the height difference between him and Beru. (02:08:10)
Corrected entry: In the scene where the Emperor declares that "the Republic will be reorganized into the first Galactic Empire", his hands change position between shots twice.