The positions of Scooby's hands when he is holding the gun change between shots.
Length of Scooby's joint when he and Toby first meet.
When the Livingstons are eating dinner, towards the end of the scene, Mikey's collar goes from inside his sweater to outside between shots.
When Consuelo was cleaning the floor while Mikey was asking her about her family, the amount of dirt on the floor changes twice when the camera is turned away.