When Gail has woken up in Katie's bed Gail's hand moves to Katie's head then disappears again between shots.
In the scene when Beverly and Luke are out to dinner, the amount of water in their glasses changes between shots throughout the scene. Also, in between shots, the water in Beverly's glass is moving and in the other shot, it's not.
During the beginning of "Bless Myself" during the showcase, Angela comes to take off Katie's jacket. When Angela first enters the stage she has a leather jacket. It can be seen when she takes Kate's jacket off. When the camera zooms out, Angela is no longer wearing a jacket. But when she is backstage directly after she has a jacket on again.
Katie's underwear can be seen when she gets locked out naked, when she is covering up her naked body with a potted plant.