In the feature, the boy portrayed by Christian Byers is sometimes called "Spark" (07:09 by Reverend Mother, 05:20 by adult Misty, 15:55 and 20:33 by Spit) and sometimes called "Sparks" (03:33 by Maps, 19:51 by Misty), with the DVD captions spelling it however the actors say it. At 09:05, where their nicknames have been scrawled in dust on the tailgate of the vehicle, it is spelled "Spark". In the End Credits (01:41:18 to 01:41:25), it is spelled "Sparks". In the novel 'December Boys' on which the screenplay is based, one of five "December Boys" is named "Spark".
(at around 22 mins) The vehicle is shown driving down the right hand side of the road whereas Australia requires driving on the left side.
Triumph didn't have electric start until 1975.
Although the film is apparently set in the 1950s or early 1960s at most, the record Maps finds in the cave features Norman Greenbaum's "Spirit in the Sky", released in 1969. Later, when Maps and Lucy listen to another record, the song played is Creedence Clearwater Revival's "Who'll Stop the Rain?", released in 1970.
In this film, set in what appeared to be the 1950s, a Triumph motorcycle appeared with disc brakes. No mass-produced motorcycle had disc brakes until the 1969 Hondas and they never appeared on Triumph models until the 21st century.