When Ben and Jamal are at their lockers after the second time Emily visits Santa, Jamal's toque keeps changing from pulled down to his ears to sitting on top of his head.
When Benjamin is at the studio trying to avoid Nancy and her children, he spots John-John as he and Delicious are walking down a hallway. Delicious is originally not wearing glasses. As he hits the tray of fruit out of Delicious' hands, he's all of a sudden wearing glasses. A moment later he no longer has glasses.
The Johnny Rocket that's shown in the movie is located on a street with a sidewalk showing the outside. When the two gentleman are then shown inside of Johnny Rocket's talking you can see from the traffic of people outside the window that this is obviously an indoor Johnny Rockets.