Revealing mistake: After Littlefoot and Cera's fight, Cera's dad says that each herd is on its own. This shocks the little dinosaurs and they gasp. Notice in this shot that though the dinosaurs move, their shadows don't. Petrie doesn't even have a shadow.
Revealing mistake: Whilst Rumi is speaking with the producer about Mima, a man comes into the room to talk about how the new CHAM is coming along. When the man stops walking to take out a magazine and places it on the table, it can be noticed that, due to an animation error, his legs pass in front of a coffee cup on the table. (00:24:18)