Continuity mistake: When Obi-Wan and Qui-Gon are talking to Jar Jar in the forest, Obi-Wan's hair is wet. But when Jar Jar says, "This way, hurry." Obi-Wan's hair is completely dry. In the next shot, it's wet again. (00:12:15)
Revealing mistake: When Qui-Gon is attacked by Darth Maul for the first time, he escapes by leaping onto his ship which quickly takes off. As they zoom up into space, he discusses the mystery attacker with Obi-Wan. However, the lighting from outside the windows never changes giving the impression that they are static on a set rather than whizzing up into space.
Continuity mistake: After Qui-Gon is struck by Darth Maul's lightsaber, he drops down, and his lightsaber is lying on the floor. In the shot where Maul turns around to face Obi-Wan, the sabre is not lying in the same place as before (seen from the colours of the floor), and the activation button faces upwards, which it didn't do in the previous shot. In the next shot of Qui-Gon, his lightsaber is now closer to him than in the previous shot.
Continuity mistake: In the scene in the podracer hangar after the Podrace, the existence and position of the people and objects keeps changing between shots.
Continuity mistake: Sebulba breaks the stabilizer on Anakin's Pod before the Podrace begins, but in the following shots where he's talking to Anakin, you can see in background that the stabilizer is unbroken. (00:54:55)
Audio problem: When Obi-Wan rushes through the Force Doors, after Qui-Gon's death, to face Maul, watch and listen carefully. Obi swings his lightsaber three times in rapid succession, Maul blocks all three attacks. The lightsabers appear to contact, there is even the almost subliminal flash from the beams hitting each other, but the sound crew only inserted two contact sound effects, and those two sounds are slightly out of sync with the actual movements.
Continuity mistake: Right before Darth Maul kicks Obi-Wan off the walkway, there's a wideshot where Obi-Wan and Qui-Gon are fighting Maul on a straight part of the walkway. In the following shots, all three of them are suddenly standing on a round part of the walkway. (01:50:45)
Continuity mistake: Near the beginning of the film, there's a few shots of the droid army landing on Naboo, with one shot of one of those hover tanks moving out of the landing ship towards the camera. In front of it are three droids in a line who are also walking towards the camera. Unfortunately, the tank is moving much faster and is bearing down on the droids with no sign of stopping - unfortunately the shot changes just before it runs them over. (00:09:55)
Audio problem: When Daultay Dofine says his first line of dialogue which is, "I knew it. They're here to force a settlement.", he speaks with the voice of Rune Haako, the Neimoidian who says, "Have you ever encountered a Jedi knight before, sir?" shortly after. (00:03:35)
Continuity mistake: When Darth Maul is killed and begins to fall, he is holding his lightsaber, but when we see him falling down the pit, no lightsaber is falling through the air. (01:59:15)
Continuity mistake: After Darth Maul falls off the walkway, Qui-Gon jumps down after him, and as they continue the fight, there are several vertical beams behind them. The number of beams and their size change between shots.
Deliberate mistake: When Obi-Wan is fighting Darth Maul alone, after Obi-Wan cuts Maul's lightsaber in half, they start fighting on a different side of the pit. But after Maul kicks him, a close-up of Obi-Wan shows the wall and smoke of the area that they left. The shot has been reversed as well. The easiest way to see this is to watch his braid, which is on the wrong side. (01:56:55)
Continuity mistake: In the shot where Qui-Gon introduces himself to Anakin's mother, Jar Jar, Padmé, R2-D2 and Anakin are standing half a metre to the left (your right) of where they were standing in the previous shot. (00:36:50)
Continuity mistake: After the final battle scene when the Jedi council come down to the Naboo city, as they are leaving the space craft there is a figure in the background who is obviously supposed to be Mace Windu, but is definitely NOT Samuel L. Jackson. The man is African-American, bald and dressed in Windu's clothes, but is not him. Perhaps Mr. Jackson was unavailable that day. (02:00:50)
Continuity mistake: Just before the podrace Qui-Gon talks to Shmi on the platform. After the conversation, they walk towards the camera. Pay attention to the background, it's the same as the previous shot even though Qui-gon and the others are walking in the other direction.
Other mistake: When Darth Maul is fighting with Qui-Gon for the first time on Tatooine, Darth Maul's first saber strike actually hits Qui-Gon's hands and saber hilt, not the blade.