Continuity: In the film's climax, Ricky Nelson is shooting out a window. A bullet hits on the frame and gouges the wood. In the next camera shot of Ricky the gouge is gone and the following shot, it is back.
Other: About 1:15 in, Dude is getting a shave from "Feathers". She does under his nose but when she says she's done and he goes to stand up there is a white strip under his nose. After the towels off it's gone.
Continuity: When Rick Nelson tells Angie Dickinson to throw the plant pot through the window to distract the gunmen who threaten John Wayne he seems to have had a hair cut between scenes as his sideburns are halved by the time he reaches the street and grow again later.