When Higgins and Magnum drive away from the restaurant in the Ferrari, Higgins is wearing her seat-belt, but during the close up, when she talks about the fish smell, her seat-belt is gone and it returns back on when the car is forced to stop.
When Nuzo is trying to convince Magnum to move to Hawaii during the flashback, he is wearing his wedding ring although he didn't meet his wife until after he arrived in Hawaii.
When eating at the restaurant Juliett uses her cutlery incorrectly.
Being British, she should have held her fork in her left hand and knife in the right.