When Jon's father asks him if he's in love and Jon confronts him, he stands up. In the next shot, he stands up again.
When Barbara and Jon meet after they split up, Barbara pulls her hair to one side. In the next shot, her hair is on both sides of her head again.
The cigarette that Jon and Esther smoke in her Jeep is longer at the end of the scene.
Near the beginning of the movie when Bobby pulls up Barbara's Facebook profile, it shows that they are close friends (there is a star next to the "Friends" button), when at this point Jon had barely obtained her name.
(at around 22 mins) When Jon is driving, his speedometer is at 0 the entire time.
When Jon is walking to the basketball court near the end of the film, a crew member is reflected in the glass doors of the cabinet next to the entrance.
The movie theater Jon and Barbara go to has the Regency Theaters logo visible. There are no Regency Theaters in New Jersey; the chain is unique to Southern California, Nevada and Arizona.