Factual error: In the scene that takes place in Ollie's office after the death of his wife, he is talking to Arthur Brickman who is sitting in front of a plaque for the band Songs:Ohia's album, "Ghost Tropic." We know that the scene is happening 7 years in the past, because Gertie is a baby. "Ghost Tropic" wasn't released until November of 2000.
Factual error: In the scene at the beginning of the movie when Ollie is driving his new born daughter to his father's house in New Jersey, you can see the new Time Warner Center on the New York City skyline. The Time Warner Center was not built until 2003, yet in the movie, he was driving seven years earlier.