1.The wallpaper in Andy's room with the little clouds on it goes midway down the wall and meets white panels. However, in the opening shot of the movie, the wallpaper goes all the way to the floor and there are no panels.
2.The side of the box decorated like a general store changes between cows drawn on and windows drawn on throughout the movie.
3.The blue blanket in Molly's crib disappears and reappears throughout the movie with no rhyme or reason.
4.Sid sets his alarm for 8:25 a.m.; however, it goes off at 7 a.m. the next morning.
5.When Buzz gets a dead bug on his helmet and Woody tries to clean it off, there is residue left. When we see Buzz moments later, the helmet is completely clean.
6.In the scene where Woody throws lights to Andy's room from Sid's house to escape, while he tries to convince Andy's toys to let him cross, the string of lights disappears.
7.When Andy has RC and Woody slam into the bank box, the flaps open from the force. However, when Andy leaves the room, they've magically flapped closed.
8.When Buzz gets taken by Hannah and Woody comes to rescue him by disguising himself in lights, the lights he left are suddenly gone as they come out of the room.
9.When Andy uses the chair's footrest to catapult Woody, he leaves it up, but when he passes it seconds later, it's back down.
10.When Buzz and Woody are about to board the Pizza Planet truck, you can see Woody and an oil barrel in the reflection of Buzz's helmet. However, the reflection isn't backwards. You can tell by the direction of Woody's overlapping fingers and the "OIL" letters.
11.When Andy goes to get Molly from her room, he lowers the crib to get her. Moments later, after he and Molly leave, the side of the crib is back up.
12.When Andy leaves his room to go to Pizza Planet, the very next shot has a Magic 8-Ball that wasn't on the desk previously.
13.After Woody's failed attempt at getting back to Andy's room, he drapes defeatedly over the window. He looks to see the other toys helping Buzz, and when he rushes over, the window is closed.
14.As Buzz realizes he's a toy, the trash can in the scene vanishes between frames and the soda cans change position.
15.The handle of the van changes from black to red between when it drives away and when Rocky Gibraltar uses it.
16.During the tea party scene, the tea pot switches directions between the time Hannah puts it down and the time that Woody runs in.
17.Finally, when RC loses power and ends up in the middle of the road with Buzz and Woody, the match in Woody's holster disappears, then reappears when they realize they should use it.
Even though I know about these mistakes now, it still doesn't take away from my enjoyment of the movie. This is a classic!!!