When Laurie walks into her house when the crowd arrives before going to the Skidmore party, she hears the two girls talking about Curley. One girl's hair is in a long ponytail. The camera pans around the room, and when it goes back to Laurie and the two girls, the girl's hair is no longer in a ponytail.
At the train station, Will Parker gets off the train and gives Aunt Eller a white box of something. Aunt Eller sits down on a bench and the camera shows her from the back, looking at Will. He says something like "let me show you guys something", to his other cowboy friends and starts to walk toward them. Aunt Eller puts the white box on the bench to her left and starts to stand up. In the shot immediately following, now showing the front of Aunt Eller, she puts the white box to her left and stands up again in the exact same way she did before.
When Jud wakes Laurey from her dream sequence, to tell her it's time to go to the party, night has fallen and it's dark. She goes inside to change. In the next scene, they're heading off to the party with everyone else, in broad daylight.
In the final "Oklahoma!" scene, everyone is gathered round outside Aunt Eller's house,with Curley and Laurie singing. Will Parker and Ado Annie slip in at the back but then they suddenly disappear and nobody notices.