Continuity: The positions of Scooby's hands when he is holding the gun change between shots.
Continuity: Length of Scooby's joint when he and Toby first meet.
Continuity: When the Livingstons are eating dinner, towards the end of the scene, Mikey's collar goes from inside his sweater to outside between shots.
Continuity: 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.