Continuity mistake: The blood on the good guy's white shirt continuously changes through the last chase. (01:22:00 - 01:26:00)
Continuity mistake: In the scene with the fireworks, the Deputy driving the vehicle has his outside mirror knocked off by a firework. You then see the same and only Deputy in the car, in the mirror getting out of the passenger side of the vehicle to confront the misfits. The change isn't due to the reflected image. (00:13:05)
Character mistake: The girl scores a goal in the soccer game but it does not actually go into the goal, so everyone is celebrating a miss. (00:02:00)
Factual error: The timeline is completely wrong. The film begins in 1902, at which point Gertrude Bell has just left Oxford and is about to go to Persia. In fact, Bell was 34 in 1902 and went to Persia ten years earlier, in 1892. By 1902 she had already been travelling for a decade.
Factual error: Ships depicted in the film have steering wheels, which would appear several decades after the events depicted. Steering wheels started to be implemented on vessels at the beginning of the 18th century.
Continuity mistake: When Zipper drops her off at her car at the beach, Marnie is wearing boots when she gets off his motorcycle. When she walks to the car she's wearing shoes.
Continuity mistake: When Penelope is sunbathing whilst Paul is on his laptop, she is face down with her head touching the lounger, but in the next shot, her head is suddenly raised above the lounger, then back to leaning against the lounger in the next shot.
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.
Continuity mistake: The belt around the dude's head changes position as he's tied down on the table. (00:39:45 - 00:40:45)