Factual error: When the soldiers are asked to find out what gifts Andy is getting at his birthday party, the set out down stairs with half of a baby monitor. Well, any parent who owns one knows that there are 2 pieces to a baby monitor. One half (the larger half) is the receiving end (that takes in the noises) and a smaller half which is the transmitting part (the half that sends out the noises). The half that the soldiers take downstairs to talk through is the wrong half. They take the half that the noise comes OUT of. So, really, they should NOT be able to speak into this part - in real life, they'd hear what was happening up in Andy's room.

Continuity: When Buzz tries to prove that he can fly and zooms down the race track you can see that his wings are going to hit the track on the loop.  Instead of fixing this the animators only show Buzz before and after these potentially disastrous moments.

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 believes that violence is okay in movies as long as the signs of it disappear by the end of the movie. Still a mistake but that's the reason.]

Continuity: In the scene where Molly is playing with Mr. Potato Head, she knocks all of the pieces off his head, except one arm. The next time Mr. Potato Head is seen, he has lips, one eye, one eyebrow and both hands.

Continuity: 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.

Continuity: When Buzz and Woody are in Sid's room, the clock stays still at 3:10. But about two scenes later that shows the clock, it changes.

Continuity: When Buzz looks at his foot and sees ANDY written on it, at first it's sloppy and a bit backward with a misshapen A, but when the angle changes it's a lot neater.