When Boo Boo is trying to stop Yogi from "helping" out at the anniversary celebration Yogi's weight makes him slide through the leaves making them form a pile behind him. They then cut to Yogi's face then back again and the leaf pile has disappeared.
After a stage falls when Ranger Smith leans on it, a farther shot shows him reaching to grab his head in frustration. However, in the next close-up shot, he is standing with a stoic expression, without having his arms anywhere near his head.
The malfunctioning window on the mayor's car switches from the right side to the left side, depending on which one he's trying to open.
But actually, the "malfunction" in the part of the mayor not knowing how to work the powered windows.
While Yogi is handcuffed to the tree, the handcuffs switch from his right paw to his left and back again repeatedly.
As Yogi dives down in the Basket Nabber 2000 to grab the turtle the G-men's SUVs are parked diagonally upper right to lower left as seen from the air, but shots on the ground show them parked diagonally left to right.
The uniforms of Rangers Smith and Jones indicate that Jellystone is a National Park, where the Mayor would have no jurisdiction, thus invalidating the central conflict.
In the 3-D version of the movie the footage from the "Boo Boo Cam" should not have been in 3-D.