During the "Family Dinner", a bottle of red wine is prominently displayed on the table. The table is viewed from several angles and it is clear that this is the only such bottle there. Lavinia suddenly rises and walks away but then returns to grab the bottle and this time leaves with bottle in hand (and mouth). The camera returns to the table where the bottle is once again prominently displayed.
When Vinnie comes to take Ginger to the driving test, Suzette's bra strap is alternately out/in between shots.
At the end of the movie, when Suzette and Harry are driving away, Suzette puts her glasses on. In the next shot, they are off again.
In the movie, Hannah is shown attending prom which was held 4 days before her high school graduation. Most high school proms are held two or three months before the end of school.
Commercially viable, easy to use instant cameras, such as the Polaroid, first became available in 1948. It is therefore possible that Jim Morrison could have been photographed, either entirely or only specific parts, before 1971. And nothing was said about the dates or ages of any of those "naughty" quickie shots.
While Suzette and Harry are driving to Phoenix, the El Camino's transmission is clearly in "Park".
During Suzette's bathtub scene in Harry's hotel room, when she raises up a little in the suds-filled tub, part of a dark-colored swimsuit is visible on her right side, between her hip and her arm pit.
Hannah is part of the class of 2002. Her tassel is backwards, and reads "Class of 2001".
Harry said he owned a Dodge Duster when he was in Hollywood. The Duster was a Plymouth; the Dodge version was the Demon.