Plot hole: It doesn't make sense that Mary is English with a heavy English accent, while both her brother and father are obviously 'Aussies'. Even if she was adopted to an Australian family, she wouldn't claim to be English, she would be a naturalised Australian.

Visible crew/equipment: When the aboriginal tribe were gathering around the burnt out VW, in one shot, you can see a white man in the background with dark body paint to make him appear to be an aboriginal.

Factual error: The aboriginal boy gets upset about the white hunters shooting the water buffaloes which symbolises white man encroaching into aboriginal culture. But the water buffaloes are introduced pests in Australia and have no spiritual meaning to the aboriginals.