While Tully Jr. and April are on the hood of his Cadillac, her cigarette pack and lighter move around the roof between shots.
When Tully goes to see Ella at the swimming hole, the towel he holds shifts positions between shots.
The position of Dexter's red pick-up moves between shots during the scene at the Swimming Hole.
In the junkyard scene with Ella, the replacement hood they find on the yellow Cadillac is an early '80s style hood, but when the hood is shown on Tully's Cadillac, it's an early '70s style. The cowl lines are noticeably different between these two styles.
Shots through the windshield of Tully Jr. driving his Cadillac show the column mounted shift lever in Park.