During the dinner scene where the Cleavers discuss the movie the boys saw that day, Wally's arms continually change position. Every closeup has both arms on the table, usually with hands crossed, while every distance shot has his right arm on the table and his left at his side.
When Beaver visits a "sick" Eddie the pop bottle in Eddie's hand changes positions between shots. In the close ups Eddie's fingers cover the logo on the bottle but in the far away shots his fingers do not cover the blacked out logo.