When Guiseppe and Amber are back from the Island and the guy with the suitcase comes to offer reward money to Guiseppe, he's wearing a blue suit. Guiseppe angrily says he doesn't want his bribe. When the man comes back into the bar with the suitcase ONE MINUTE later at the most - he's wearing entirely different clothes. He has a green suit on. Pretty fast change.
Exactly 20 minutes into the movie, when a tipsy Amber runs into Giuseppe in the hallway as the boat is swaying back and forth, the position of Giuseppe's hand on the giant dead fish he's carrying changes between shots.