Continuity mistake: During the scene in which Charlie and Louis manage to crash their plane, they hit a chimney and the plane's left wing goes flying on its own. Moments later, however, it has attached itself to the plane again, before in the next shot disappearing again. (00:38:35)
Revealing mistake: Any time that Charlie is kicked by the kangaroo, they show him falling back onto the ground. But, if you look closely, they just used the same shot over and over. The exact same two lines in the dirt are to his left by his head each time.