Revealing: When Jon and Liz are in the hotel room just after the animals make and eat lasagna, Liz giggles. However her mouth doesn't move to indicate that she giggles, proving that it was added in later.
Great sites
Mistakes
Just before Liz rings the doorbell, the wine stain on the front of Jon's shirt changes shape repeatedly between shots, then vanishes altogether. See more...
Trivia
During the song "Moving On Up", we see paintings of Prince's ancestors. In one of them is Jim Davis, the creator of Garfield. See more...
Garfield: A Tail of Two Kitties mistakes
Continuity: During Garfield's lasagna speech in the kitchen, the gourds on the table keep changing positions.
Continuity: When we first see Odie on the double decker bus (about 22 minutes into the film), he is wearing a miniature souvenir "bobby" helmet. Then we see him chasing pigeons in the square hatless. Then the hat returns (did he have pockets to keep it in?). Then they are at a statue of Churchill - again he is hatless and we never see the hat again.
Garfield: A Tail of Two Kitties trivia
During the song "Moving On Up", we see paintings of Prince's ancestors. In one of them is Jim Davis, the creator of Garfield.