Factual error: In the football match between Dungatar and Winyerp you can occasionally see the railway line in the background. This is the Melbourne to Adelaide rail line in use today. The rail line has concrete sleepers, which were not introduced until the 1980's. They can be seen as they are whiteish. The Dressmaker is set in 1951.
Factual error: Dev Patel is standing in front of Trinity College's statue of Issac Newton. Directly behind the statue is a marble wall with names carved into it. This wall is a list of the members of the college who died in World War II. It would not have existed in 1914.
Factual error: Michael's wife meets with Longo in prison, and she has an iPhone. The trial was in 2003, 4 years before the introduction of the iPhone in 2007.
Factual error: The movie is set in the late 90s but in the parking lot scenes, the pair are surrounded by cars as new as 2012.
Factual error: The Sheriff clears all other police traffic on a specific radio frequency so that he can "secretly" chat with the two young boys. Of course, secrecy is crucial to the Sheriff's motivation all throughout the movie. However, police radios have extraordinary range, and police radio channels are constantly monitored by neighboring police forces, by other first-responder agencies, by civilian police scanners, and even by the news media. The Sheriff should surely know that it is impossible to conduct a "secret" or even "private" conversation over police radio.
Factual error: Tina's striptease dance is mentioned several times as a notable scene in the fictional 1986 movie 'Camp Bloodbath'. When that scene plays out, the song Tina dances to is Warrant's 'Cherry Pie', which wasn't released until 1990.
Factual error: Evita Peron died in 1952. In this movie, the doctor finishes embalming her during the Coup d'état that deposes her husband...in 1955.
Factual error: In the early scene when they enter the "It's a small world" ride at the '64 World's fair, the monorail in the background runs way too fast. The actual one moved very slowly. Also the monorail would not have been visible from the Pepsi Pavilion.