When discussing Nullah's future, Sarah mentions "a wonderful School of the Air." School of the Air is a correspondence course that uses shortwave radio (and, now, the internet) to teach children in the Outback. The Alice Springs School of the Air covers over a million square kilometers. School of the Air started in 1951.
After the title, when the animated globe switches from Australia to Europe, Germany has modern borders. In 1939 the Third Reich included what is now western Poland, East Prussia/Koenigsberg (now Kaliningrad) next to Lithuania, Austria, and Sudetenland.
In the first "tent" scene between Drover, Sarah, and the Aboriginal stockmen, Drover speaks to Sarah while cleaning his teeth. His toothbrush has dark bristles in the center, white bristles around the outside, and a pointed end. In 1939, toothbrushes were rectangular, with white bristles.
When the Japanese airstrike starts, a priest makes a transmission from Mission Island, and ends it with "over and out". The correct way to end it is "out." "Over" means you're turning the conversation over to the person you're talking to.
While the group rests overnight during their trip to Darwin, Fletcher's guys pour out the gasoline and light it up. When the fire starts, it's pitch black and the stars are visible. When the stampede starts, it's mid-day.
When Sarah asks Flynn to tell her all about Faraway Downs and Fletcher, Flynn pulls out a full bottle of rum. When he opens it in the close-up shot, it's a different bottle, partly full. In the next scene, he holds the open full bottle.
When Fletcher comes over to speak to Sarah, just after Nullah has been taken to Mission Island, Sarah is holding her hat in one hand. She hastily switches it to her other hand, but in the next cut, it's back in the hand it started in.
As Nullah gallops back to Faraway Downs after mounting the horse at the waterhole, a dust trail is visible in front of his horse. Evidently, someone is galloping ahead of him to make sure that his mount will follow.
When Copper Callahan first arrives at Fareaway Downs, he introduces himself as "Northern Territory Police". On the map in King Carney's office, which is shown during Lady Ashley's arrival, Faraway Downs is entirely located in Western Australia.
When Fletcher gets into the pickup truck to leave Faraway Downs, he gets into the left front seat and drives away with the steering wheel on the left side. Australian traffic drives on the left side of the road, and Australian vehicles usually have the steering wheel and driving controls on the right.
One shot, edited in from Tora! Tora! Tora!, shows the USS Oklahoma and the USS Maryland. No battleships, American or otherwise, were in Darwin during the attack. Smaller warships were there, including American destroyers.
When the refugee boat enters the harbor after the attack, it passes the bombed-out remains of the ship Barossa, lying on her side and burning. In real life, the Barossa, while heavily damaged, was towed to safety and later salvaged.
When Nullah (Brandon Walters) and his mother Daisy (Ursula Yovich) evade deportation by hiding in a water tower, the tank is full of holes but it fills up within a few minutes when the wind blows. In fact windmills can take hours to fill a tank with water, even if the wind is blowing strongly, and probably never if the tank has big holes in it.
When the cattle drive arrives in Darwin, the British Officer is prepared to sign a contract with the typed date of 01 Sep 1939, the date typed onto the body of the contract is shown as 1940, and the date on the newspaper in the beauty salon is 29 October 1939.
During the attack scenes, some planes' wheels are retracted while bombing or shooting, others are extended. Aichi D3A "Val" bombers had fixed landing gear. Mitsubishi "Zeke" (or "Zero") fighters had retractable landing gear.
Copper Callahan and his men arrive at Faraway Downs looking for Nullah, and don't find him. However, when they drove up to the ranch, Nullah and Daisy were climbing the water tower ladder, facing the truck. As they leave, two policemen sit in the bed of the truck as it pulls away. People on the station run toward the water tower in obvious distress. Drover climbs the ladder to retrieve Nullah and Daisy, in full view of the police in the truck bed no more than 50 yards away, yet the truck makes no response.
A clip from the beginning of The Wizard of Oz is shown in plain black-and-white, as is often seen on television. In its original theatrical run, those sequences would've been in sepia-toned black-and-white.
Near the beginning of the movie, the Aboriginal boy rides a black horse, then jumps off the animal. As he jumps off, the lead rein is hooked to a bridle held by an off-camera horse trainer, keep the horse from moving.
When Drover rescues the children, he holds the youngest one as they enter the water. In the next shot, he's holding a rifle. In the next one, he holds onto the raft with the others, without a gun. The gun disappears and reappears throughout the scene.
When Lady Ashley, Drover, and the children are reunited on the wharf, the military ambulance behind them was at other battle scenes at different locations in the same time setting. The hood ID number gives it away.