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- Grandma's sign and Ernie's model say Circle Theater, but the building itself says Circle Theatre.
- At one point when Arnold is talking to Grandpa on the roof, Grandpa's eyebrows become see through and their outline changes to white.
- At dinner the salt and pepper shakers are beside a glass and all three are white, then during Grandma and Ernie's argument the glass is shown between the salt and pepper shakers and all three have become blue.