Continuity mistake: When they go to the famous writer's hometown, the mayor is taller than the writer then later he is shorter than him.
Audio problem: When people waited for the ghost and left, Velma says, "Let's give it a chance, Ben." But Daphne's lips are moving.
Factual error: When the gang follows Ben Ravencrift home, they cross over a long bridge supposed to signify Brooklyn, but is in fact, The Golden Gate Bridge in San Francisco.
