Avatar
- Incorrectly regarded as goofs: The human Avatars in the movie all have 5 fingers and toes while the natives only have 4. The reason for this is to show subtle differences in the Avatars due to the mixing of human and native DNA.
- Incorrectly regarded as goofs: In the scene where Jake is looking at the photographs of the Na'vi on the refrigerator, the photographs themselves are 3D. This is an invention which exists since 1940 and is called lenticular printing. We can only assume that, like much of the technology in the movie, the quality of those prints has advanced by 2154.
- Continuity: During the shot where Quaritch says to Jake "That's called taking an initiative son", Jake's hands are rested up on the hologram table. In the next shot where Quaritch says "I wish I had ten more like you", Jake's hands are down at his sides.
- Errors made by characters (possibly deliberate errors by the filmmakers): During one of Jake's video logs, Grace can be seen working on an experiment in the background. In the process, she draws up some liquid in an Eppendorf pipette. However, in the process of transferring the liquid to its intended vessel, she inverts the pipette, which would severely damage it.
- Revealing mistakes: The first part of the credits are shown over panoramic views of Pandora. Most of these shots are recycled from the movie, and reversed left to right to make it a bit less obvious. One in particular was taken from Jake's ikran first flight sequence, but with Jake and the ikran removed. But you can still the ikran's shadow pass over the rocks.
- Continuity: In the scene where Parker is shown playing golf on the indoor golf course in RDA, the first time he hits the ball, there are two other balls lying on the course side by side. In the next shot, two are distant from each other and in the shot after that, they are in their original position.
- Continuity: Jake is reviewing the structure of the home tree with Quaritch and Selfridge around the rotating 3-D map. When Jake makes a comment about the Na'vi studying him, his watch reads 2:19. Selfridge makes a comment about how the tree is sitting right over the richest Unobtanium deposit. When the camera cuts back to Jake his watch now displays 2:53.
- Continuity: In the colonel's robot there is a rear-view mirror. When we see the robot from the outside, it is very close to his head. But when we see shots from inside the robot, there is plenty of room around his head and we don't see the mirror.
- Continuity: When Quaritch is scolding Jake for making out with a Na'vi, Jake moves his head to the right. In the immediate next angle, his head is straight.
- Continuity: In the scene where Jake wakes up from his link and Grace asks him, "Is the avatar safe?" and he replies, "Yeah Doc, and you are not gonna believe where I am," her hand is on top of his shoulder. But as the camera angle changes back and forth her hand switches to the side of his upper arm and back to the shoulder without time to have made the move.
- Continuity: When Jake is recording his first video log entry, he moves the recording camera around a little to get a better view of his face, and is looking directly at a screen to his right to see if he's centered his face correctly. In the very next shot, he is staring straight forward at the camera.
- Revealing mistakes: When Jake's late brother, Tom, is uncovered, he's played by Sam Worthington. In the next shot of Tom being covered again it's clearly someone else.
- Continuity: When connecting with the Mountain Banshee for the first time, Jake's hair switches from being over his left shoulder to being over his right between shots. (His hands are on the Banshee the whole time so he had no chance to change it.)
- Continuity: When Seze first comes out of the tree, if the viewer watches carefully, he/she can see Neytiri's ponytail being flung over her left shoulder, indicating that it would be hanging down her front, but in the next shot it was hanging down her back.
- Revealing mistakes: In the scene where Jake lands on Pandora for the first time, when all other personnel have gotten off the transport ship it is revealed that Jake is paraplegic. When he gets up from his seat into his wheelchair, after lifting his legs from the seat with his arms and putting them in place on the wheelchair, you can see him moving his left leg a bit backwards (without touching it).
- Continuity: When the colonel is in the robot asking Jake to report to him, in one scene a red disconnect flag is hanging off the robot's leg, but when the colonel starts to walk, the flag is gone.
- Continuity: When Jake goes after Neytiri to thank her the first time they meet, she beats him with her bow with attached arrows. For a few seconds, in the next dialog, the arrows disappear.
- Continuity: When Parker Selfridge wants to explain the situation (the 'Blue Monkeys') to Jake and asks someone to operate the hologram showing the layout of the landscape he says stop at sector '12' (Hometree), but when the scene cuts to a closeup of Jake the yellow hologram readout clearly reads 'Sector 128'.
- Revealing mistakes: When Jake first tries to convince the Na'vi not to fight, and Tsu'tey shoves him, Tsu'tey's eyes are colorless and gray. In the scenes before and after this, however, his eyes are clearly yellow.
- Revealing mistakes: Jake walks up to the Tree of Souls to pray to Eywa with his ponytail down his back normally. Jake kneels before the tree, with the ponytail in the same spot. Jake reaches down for something, the shot changes, and the pony tail appears in his hand. This was likely done to match Sam Worthington's performance as he was not holding it as he approached the tree, and it would look unnatural for him to do so, being at odds with the motion capture data.
- Revealing mistakes: In the first battle sequence, Jake is seen shooting his weapon upwards, towards a helicopter. However, in the next sequence, the helicopter is shown being hit, but the bullets are coming down, opposite from the direction Jake shot them.
- Continuity: When Jake lands at the Tree of Souls, with Toruk. He has no dagger in the sheath on his chest. A few shots later, he has his dagger back. This is an impossibility as Jake lost his dagger earlier.
- Revealing mistakes: When the shuttle lands at the start of the movie and the doors open, an extra is seen in the background with his mask slipping off, he does not react to the poisonous atmosphere, instead he keeps trying to pull it up, and it keeps slipping off.
- Continuity: Mo'at stabs Jake with the arrow to check his blood. In the next shot, she licks the blood again.