When June is helping Beaver move into his room, she is wearing a certain dress. She kisses him good night and walks out. When the camera cuts to her coming down the stairs into the living room, she is wearing a completely different outfit.
When Ward and June are setting the table at about 10 minutes in, Ward's hand alternate between in and out of his pockets on the back of the chair between shots.
When Ward is talking to June after setting the table, his hands are in his pockets. Just as he says "the social order," the camera moves farther away, and both of Ward's hands are now gripping the back of a chair.
When June takes the paint brush from Ward he crosses his arms and is holding the paint can on the sides but in the next shot his thumb is over the top of the rim sticking in the can.
There is no paint in the can Ward is using to touch up the kitchen door. He dips the brush into the can but the brush isn't covered in paint when he acts as if he is wiping off the excess on the rim of the can.