Revealing mistake: When everyone is cheering to Bender, you can see Fry on the right hand side of the screen wave to him twice. The second time he cheers, his hands move from the table to suddenly waving at Bender without any animation. (01:19:50)
Futurama: Bender's Big Score (2007)
1 revealing mistake
Directed by: Dwayne Carey-Hill
Starring: John DiMaggio, Katey Sagal, Tress MacNeille, Billy West
Other mistake: When Leela is signing the petition, Amy grows a third arm for a split second.
Bender: Here's your Gutenberg Bible, master. Plus the Colonel's secret recipe: Chicken, grease, salt.