The registration plate of Tiffany's car reads "127 UBO" when the Angels start following the truck, but then reads "846 RUZ" when they arrive at the warehouse. Also, the letter "D" in the word "FORD" at the edge of hood on the 127 UBO Pinto is missing. On the 846 RUZ Pinto, the letter "D" is there.
Tiffany partially opens the cabinet doors on the yacht to expose the gold. When Bosley enters the room the cabinet doors are now wide open though Tiffany has not moved. A moment later the doors are only partially open again.
When the angels are piloting the yacht, Tiffany's hair switches from having elastics on either side of her forehead tying her hair back to her locks falling on her face, elastics gone.
When Bosley is reading the medical file at the harbor doctor's office, he reads out the name on the file as Captain James Webner. The medical file actually lists his name as John Webner, and there is no mention on the file of he being a captain, his occupation listed as merchant marine.
Ken Atamien yells at Pat Justice "If we lose the tide it will cost us another three hours." Power boats don't have to worry about "catching the tide."