Character mistake: Before he scampers inside to spy on the humans, Claudius tells the other animals, "I'm your mouse on the inside!" Maybe he should check a mirror while he's in there. Claudius isn't a mouse - he's a rat.
Garfield: A Tail of Two Kitties (2006)
1 character mistake - chronological order
Directed by: Tim Hill
Starring: Bill Murray, Billy Connolly, Jennifer Love Hewitt, Breckin Meyer
Continuity mistake: After Jon tells Garfield that he is going to ask Liz to marry him, Garfield knocks Liz's picture to the ground and we hear glass break. When Jon comes back into the room to turn off the stereo, the picture is suddenly back up on the table without him replacing it.
Prince: Oh well. Back to sleep.
More trivia for Garfield: A Tail of Two Kitties