Other mistake: During the scenes in Andy's room, when characters are standing near the window beside Andy's bed, and also on both the interior and exterior sides of the window behind the desk, we can see the same markings/scratches/chipped paint on their white lower sash rails, though the marks on the exterior side of the window behind the desk, are actually opposite from the other marks.
Continuity mistake: When Andy has Woody slide down the banister there's a green/white striped rug directly in front of the door, but when the area of the floor in front of the door can be seen from the living room such as when Andy shouts, "Score," the rug is gone, then it reappears when Andy rushes back upstairs to get Molly. (00:02:40)
Continuity mistake: During the earlier scenes in Andy's room Molly's bottle is beside the lamp on the small wicker dresser near the crib, and it disappears and reappears, such as when Buzz wants to prove he can fly he stands on the bed's footboard and the bottle is gone, but it reappears when he lands on the race track. (00:19:00)
Continuity mistake: When Sid runs out of his room with Buzz, the chair's in front of the dresser smack between the bed and wall, but when Babyface knocks out the morse code on the bed frame the chair should be seen but has vanished, and then it reappears where it should be, right beside the bed.
Continuity mistake: After Buzz knocks over the tool box onto Woody, in the overhead shot from behind Buzz as he looks down at the floor and also the closeup of the toolbox, the dumbbell's between the chair and bed, but when Sid grabs Buzz and runs off the dumbbell's moved to the other side of the chair, beside the wall and dresser.
Continuity mistake: When Andy's toys see Woody holding Buzz's severed arm they abandon him, and Slink drops the window blinds while Woody's leaning out Sid's window that's still open, but when Woody turns around to see Sid's mutant toys start working on Buzz, Woody jumps off the table and suddenly that window is closed behind him.
Continuity mistake: Toward the end of the movie when Woody opens the moving van door and is hanging on it you can see in the background Scud trying to get Buzz from underneath the car, but right after Woody spots the box he needs to look in we are shown a scene of Scud struggling with Buzz who is at this point thrown under the car. (01:08:55)
Continuity mistake: When the toy soldiers get stepped on, the mom sweeps them with her foot to the right of the door. So when they are active again and go the left, they should go by the door right away. Instead they are to the right of the potted plant. (00:10:50)
Continuity mistake: When Woody and Buzz run for the Pizza Planet doors under cover of Pizza Planet cups and burger dishes, Buzz says, "Hurry Sheriff, the airlock is closing!" Just after he says that, the camera changes view to inside Pizza Planet, and the distance that they've run changes instantly. (00:33:22)
Deliberate mistake: Sid burns a hole into Woody's forehead in the middle of the film, but by the final scene (as the toys are waiting to hear what Andy has gotten for Christmas), the burn hole is completely gone. [Disney takes the attitude that violence is okay in their movies as long as the signs of it disappear by the end. Still a mistake but that's the reason.] (00:43:35)
Continuity mistake: At 09:21 on BluRay disc, is the scene where Woody is instructing the army man to go downstairs. You can see in his left hand there is a set of binoculars and in his right hand is a pistol. In the very next shot (at 09:26) you can see the binoculars in his left hand, but the pistol has disappeared from his right hand, enabling him to salute Woody. A few shots later (09:33) we get a good look at the army man. The pistol is still missing. We also get a look at the holster, which is empty. There was no time for the army man to put the pistol in the holster between shots, and it would technically be moulded to his hand anyway. (00:09:20)
Continuity mistake: When Buzz watches the TV commercial and realizes that he's really a toy, by the time "Al's Toy Barn" is mentioned and he reads "made in Taiwan" on his arm, one of the soda cans on the floor changes its position and the trash bin with the crumpled paper around it vanishes.
Continuity mistake: In the scene where toys in Sid's room make their first appearance, they crowd around the middle of the room and pull at Janie's body and the Pterodactyls head. The shot cuts to Woody on Buzz looking horrified. When it goes back to the toys, they're dragging a different dolls body away (the same one that is seen sitting for tea with Buzz in Hannah's room in a later scene). (00:40:50)