The fuse box is on the right side of the Taylors' front porch. In the immediately preceding episode, Man in a Hurry (1963), there is no fuse box on the front porch. The next time that side of the front porch is seen, in Andy's English Valet (1963), there is no fuse box.
Somehow, the dining table gets cleaned up during the time Andy is waiting on Luke.
When Andy hears someone rustling around in his backyard at night, he peers out the window and smiles broadly, realizing that Barney has asked someone to watch over and protect him. But the following morning, when he tells Barney he doesn't need bodyguards, Andy is visibly annoyed.
As Luke steps off the bus, his feet straddle a crack in the sidewalk. A different camera angle shows him then turning to the left, but the crack is gone.
Aunt Bee drops a pan on Otis who is outside making cat noises. She then goes to bed with the window open. Andy confronts Barney the next morning and tells him that there was no reason to have Gomer and Otis outside in the cold. If it was cold, Aunt Bee would have closed the window.
When Andy and Luke Comstock go outside to fix the lights, they hear Barney, Gomer and Otis struggling inside the house. Though Luke is partially turned away from the camera, his mouth is seen moving (possibly saying something like "What is that?" in reference to the noise) but there is no sound.