Other mistake: During the Macarena, the extra on stage closest to the camera is wearing an Apple Watch which was not yet available. (00:18:17)
Other mistake: When the FBI returns their belongings to the apartment, they exit via the kitchen, where there is no door.
Other mistake: At the beginning of the press conference with Richard's mother, one of the photographers is using a Canon EOS 1D, which did not come out until 2001.
Factual error: A modern conference call system can be seen on the desk inside the FBI office.