Continuity mistake: Jack and Neytiri successfully save their children and eliminate four soldiers from a group of six. However, during the extraction scene, all six soldiers reappear.
Continuity mistake: Towards the end of the movie, Malcolm, Grant, Ellie, and Maisie are in a Jeep that tumbles down a hill. As it is tumbling, an impact extinguishes the headlights and interior lights. However, as the Jeep comes to rest at the bottom of the hill, the lights are back on. They remain on for all the following scenes. (01:44:53)
Continuity mistake: Ishmael shots Karim in the right side of the stomach, but the wound moves to the left side.
Continuity mistake: The top of Brecken's head was close to (within a few inches of) the headboard before his mother brought the pillow. When his mother put the pillow over his face and the camera shifted to a right-side rear view, the upper part of the bed was raised about 45°. When Lang Dotrice (Brecken's father) arrived and sat on his bed, the pillow used to smother Brecken was at least a foot away from the headboard and Brecken's head (still under the pillow) was about a yard away from the headboard. (00:04:05 - 00:07:16)
Continuity mistake: Alan goes into his appointment with Dr. Fredericks at 5:08, and it is still 5:08 on the wall clock when he leaves her office. (00:10:20 - 00:14:03)