Continuity mistake: When Dargis is talking to Liz in the kitchen, he is wearing a brown suit. He then leaves the kitchen in pursuit of Garfield, and the next scene shows him in a black jacket and gray pants. There was no time to change clothes.
Audio problem: 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.