Incorrectly regarded as goofs: The Texaco sign is missing the letter "E" on one side and "A" on the other; as both sides are seen, some people got confused.
Continuity: Just before Jacy goes off with Lester to the pool party, she and Duane are making out in the car. She moves her legs across the seat of the car and is clearly wearing light colored, flat soled shoes with bows on the top. When she takes her shoes off at the pool party, she is wearing shoes with no bows.
Continuity: The camera's shadow can be seen at the bottom of the screen as it tracks a car towards the end of the film.
Continuity: When Sonny and Jacy are driving to Oklahoma to get married, several things about Sonny (position, hair, etc) change between shots.
Factual errors: When Duane returns to Anarene toward the end of the film, he is on leave from the US Army in the middle of the Korean War, around 1952. His hair is clearly too long to pass Army regulations, which limit the length of a soldier's hair, after he has completed basic training. His hair would be too long even for today's Army. Moreover, Duane has sideburns, which the Army would never have permitted.
Audio/visual unsynchronized: At the very beginning of the film Sonny is having trouble starting the old rusty pickup truck. After getting it running he starts to drive off. The soundtrack has him changing gears but we still see him with both hands on the steering wheel.
Anachronisms: The movie is set in the early 1950s, but at 50 minutes and 19 seconds in, when Sonny is driving through town at night just after he first has sex with Mrs. Popper, a car from the mid-1960s or later is briefly visible.
Crew or equipment visible: A full-length shadow of the camera and crew is visible when Sonny drives up to Ruth's house for the first time.
Anachronisms: The jukebox shown several times in shots of the diner interior is a Wurlitzer 2000 model, this was not produced until 1956.
Anachronisms: As Sonny drives past all of Sam the Lion's businesses (from which he has been banned), there is a brief shot out the truck's window which takes in a 1960s-vintage car parked at the curb.
Anachronisms: When Lois Farrow makes a telephone call from her home she dials a seven digit number. In 1951 a telephone number would have been at the most five digits in the small town of Anarene, Texas.
Anachronisms: Several scenes show television programming, however TV was not introduced to the Wichita Falls area (and Anarene) until 1953. The movie takes place in 1951-52.