Continuity: After Anakin tells Mace Windu that Palpatine is a Sith Lord, Anakin says, "I must go, Master," and Mace answers, "No," but his lips are saying something else. (Time)
Directed by George Lucas, starring Ewan McGregor, Hayden Christensen, Ian McDiarmid, Jimmy Smits, Natalie Portman, Samuel L. Jackson, Anthony Daniels, Christopher Lee, Frank Oz, James Earl Jones, Kenny Baker, Peter Mayhew
Please note: There are a few minor issues, such as Obi-Wan saying he hasn't used that name "since before you were born", among others, which can easily be attributed to character mistakes, ie. mis-remembering things, rather than "real" movie mistakes.
Continuity: After Anakin tells Mace Windu that Palpatine is a Sith Lord, Anakin says, "I must go, Master," and Mace answers, "No," but his lips are saying something else. (Time)
Continuity: In the scene where Anakin and Padmé discuss the war and the Republic, some of the pillows on the couch change position slightly between the first two shots. (Time)
Continuity: After Darth Sidious kills Mace Windu, Anakin drops his lightsabre to the floor as he sits down. During the rest of the scene, the sabre changes position on the floor twice. (Time)
Continuity: When Anakin and Padmé are talking on the couch after Anakin is appointed to the Jedi council, they keep changing position between shots, depending on the angle of the camera. The easiest way to see this is to watch the red cloth hanging behind them on the couch. In some shots it is behind Padmé, in other shots, it is behind Anakin.
Continuity: When Anakin visits Padmé before going to Mustafar, as he says, "Have faith, my love." he's touching the side of her head. In the next shot, his fingers change position. (Time)
Continuity: After Yoda says "At an end your rule is. And not short enough it was" he flips toward the doorway to block the Emperor. Yoda's wooden cane that was on the floor in previous shots is now missing for the remainder of the scene. (Time)
Continuity: When Count Dooku ignites his lightsabre, his arms are up and the sabre is pointing right. In the next shot, his arms are down and the sabre is pointing left. (Time)
Continuity: When Padmé is waiting for Anakin by the giant column, her position by the column differs between shots, seen from its design. This also happens to both her and Anakin as they're talking. (Time)
Continuity: In the first shot of the scene where the Jedi Council refuses to give Anakin the rank of Jedi Master, Obi-Wan has both feet on the floor. In the next shot, one leg is crossed over the other. (Time)
Continuity: In the beginning of Anakin and Padmé's conversation on Mustafar, as Padmé says, "I was so worried about you.", Anakin's hand is on her waist. In the next shot, his hand is on her back. (Time)
Continuity: On Utapau when Obi-wan is looking down upon Grievous and the Separatist leaders, you can see Grievous is very far away (judging by the floor panels, perhaps 10 floor panel widths taking into account the diagonal angle at which Obi-wan is looking at Grievous). Obi-wan proceeds to jump straight down, but in the next shot where Obi-wan lands, Obi-wan is only 1 floor panel width away from Grievous. Then, in the next shot which shows Obi-wan surrounded by droids, he is now 2 floor panel widths away from Grievous.
Continuity: In the first shot of the scene where Yoda leaves Kashyyyk, as Tarfull begins to walk towards Chewbacca, Yoda is several metres away from them. In the next shot, he is much closer to them, and Tarfull, who is still walking, is further away from Chewbacca than in the previous shot. (Time)