Six-Can Solution/Silence of the Sheep - S4-E21
Continuity mistake: In "The Six Can Solution" Odie steals 6 cans, then when he gets to the girl's house there are 12 cans in his red wagon when the camera zeros in on Squeak. (00:10:10 - 00:11:30)
The Garfield Show (2008)
1 continuity mistake in season 4 - chronological order
Starring: Frank Welker, Gregg Berger, Wally Wingert
Land of Hold/Penny Henny - S2-E17
Deliberate mistake: When Garfield brings Jon to the broken TV, the scene's animation is still unrendered. (00:01:04)