Continuity mistake: When Obi-Wan kills Darth Maul, he grabs Qui-Gon's lightsaber with his left hand. But when he twists above Maul's head, he's holding it in his right hand. In the next shot, it's back in his left hand. (01:59:10)
Continuity mistake: Before the pod race begins, as Jabba the Hutt says, "Welcome.", the woman to his right has her hand on the wall. In the next shot, she is no longer touching the wall and her head is turned in a different direction. (01:56:00)
Continuity mistake: When Jar Jar goes to retrieve the wrench that he dropped in the engine of Anakin's podracer, he moves his hand towards the upper part of the engine. In the next shot, he sticks his hand into the middle of the engine. In the following shots, his hand remains in the middle, but when he says that he's stuck, his hand is once again in the upper part. (00:46:45)
Continuity mistake: When Anakin is sitting in his Naboo starfighter about to take off, there is one shot of R2 with his projection nozzle on the left side of the red light instead of the right.
Continuity mistake: When Qui-Gon delivers the hyperdrive, the way he holds the reins of the eopie he's riding changes between the first two shots. (01:08:25)
Continuity mistake: When Anakin and Padmé arrive at the Podracer hangar, Anakin is taller in the first shots than in the shot where he gets off the animal they're riding on. (00:51:45)
Continuity mistake: When Amidala's starship runs the blockade, after the spacecraft flies towards the screen, there's a shot where R2-D2 is missing from the top of the ship. (00:25:35)
Continuity mistake: As someone else has noted, Obi-Wan's braid changes sides a few times in the movie. In the first scene with Jar Jar, his braid stays on the correct side of his head, but after he says, "If they find us, they will crush us" it goes from hanging in front of his shoulder to hanging behind it. (00:12:05)
Continuity mistake: When Padmé is to come with Qui-Gon after the Queen's ship has landed on Tatooine, he says, "This is not a good idea", and something blurry flies by in the upper right hand corner. It is not there before or after. (00:29:25)
Continuity mistake: Jar Jar knocks down a bunch of droids in Watto's shop, but when they leave, you can see the feet of the now stacked up droids. (00:33:15)
Continuity mistake: When the final duel between Obi-Wan and Darth Maul begins, they are fighting in a particular area next to the pit. But when Obi-Wan cuts Maul's lightsaber in half, the background changes and they are suddenly fighting on a different side of the pit. (01:56:40)
Continuity mistake: During the funeral pyre scene, the folds in Obi-Wan's hood change between consecutive shots.
Continuity mistake: When Palpatine and Queen Amidala address the Senate, the holocam flying around near them is inconsistently placed between shots.
Continuity mistake: In the first scene in Watto's shop, a cloth lying on a device on his desk keeps changing position between shots. (00:30:25)