When Mr. Cushing is standing next to Miss Slocum in front of the desk in his office there is a white mark is on the carpet under his left foot (perhaps a stage mark showing him where to stand). As he complains to her about how Elly May won the contest instead of her, Jethro and Jed arrive. When Mr. Cushing ushers Jed into the room the mark is gone.
When Granny and Jed are talking to Mr. Drysdale in his office about her money a hat stand with his hat on it is next to the painting behind them, but when they switch to a close up of just Granny it's missing.