When Glenda puts on her helmet to get on the motorcycle she doesn't properly thread the strap, yet at the next stop her helmet is properly adjusted.
When Danny leaves the house the morning after spending his first intimate night with Glenda, he has no shoes on. Yet in the subsequent shots (as he meets with a gaggle of reporters), Danny clearly has black shoes on.
When Danny first falls out of the tree in Glenda's yard he has a large cut on his shoulder, which Glenda helps him clean. It's still there the next morning when he swims in the river, but by the next time we catch a glimpse of his shoulder, just a few days later, it's gone.
When Danny encounters the fireworks, his balloons filled with helium would not have exploded, given that helium is an inert gas.
When Danny bites the balloon and falls out of the chair, the next shot shows the AMP Building (viewed from above) in a mirror image.
In the beginning, Danny tells his friend he is flying to Port Douglas to go camping. Port Douglas does not have a civil airport. To get to there from Sydney one would have to fly to Cairns and then catch a bus farther north to Port Douglas
An important missing person alert is broadcast on television, with a plea for information on his whereabouts, yet does not include a picture of the subject.
It's made clear that Danny Morgan and Trudy are unmarried. Yet when Sandy interviews her on the disappearance she's listed as being Trudi Morgan. She would only have Danny's last name if they had gotten married.