Other mistake: The bus carrying Gary, Mary, and Walter passes a sign saying "Now leaving Smalltown U.S.A." but the sign is on the opposite side of the road and facing the wrong direction. It can be seen only by drivers entering the town. (00:11:15)
The Muppets (2011)
1 other mistake - chronological order
Directed by: James Bobin
Starring: Amy Adams, Chris Cooper, Jason Segel, Rashida Jones
Revealing mistake: During the opening musical number, right before Gary joins the large group of people for the dance, he accidentally kicks Walter out of frame. Watch closely though. His foot comes nowhere near Walter when he supposedly "kicks" him.
Statler: Is this movie in 3-D?
Waldorf: Nope! The Muppets are as one-dimensional as they've always been!
Trivia: Frank Oz, the former voice of Miss Piggy and Fozzie, chose not to be a part of the film, after being dissatisfied with early drafts of the script. He later stated that he enjoyed the finished film for the most part, and that it didn't contain elements he had earlier objected to. (Though he commented that he didn't enjoy the "Disney Process" that went into the production of the film, and he felt that the film was slightly "too safe", though he enjoyed it overall).
Answer: He was a greedy man who wanted to drill underneath the Muppet Theater for oil. He was Ebenezer Scrooge.