At about 13 minutes in, when Rory is chopping cucumber, the close-up view shows him doing it slant-wise, making oval-shaped slices, but the wider view shows him cutting it straight across, producing circular pieces.
When Harold drives up the driveway to Eve's house, all the windows in the car are up. As the car goes around the fountain, the driver's and front passenger windows are down. As the car stops past the fountain, the driver side window is all the way up.
At the rehearsal dinner, Priscilla is singing her gift for the bride and groom. In the closeup of Eve & Harold dancing, Priscilla's song continues and she is seen with a microphone near her mouth but her lips are not moving.
When Ethan (wearing a plaster mask over his face) runs into a wall and falls down on his back, the outline of protective knee pads are clearly visible under his blue jeans.