In the yoga scene, June takes off her right sock. When she puts her right foot on Cooper's face minutes later, she is wearing a sock.
In the flashback to first grade, June's eyes are brown. In the present day, they are blue.
When they eat dinner on Johann's picnic table, Johann's mole is on the left side of his face. When someone says "Have you ever done any modeling? You have unbelievable bone structure", Johann's mole is on the right side of his face.
When Johann sings in the restaurant, people suddenly appear behind him, then suddenly disappear in the next scene.