Bobby has 2 guitar straps, one around his shoulder and one hanging loosely.
Also, when the show resumes from the theme song, the shoulder strap is hanging around the other shoulder.
Hank's golf club briefly vanishes between shots.
Also, the lawn chair they are sitting on suddenly increases in size.
Hank is sitting at the table still in his yellow golf shirt but when Bobby is listening to him through the window, Hank is wearing his standard white t-shirt.
Plus, the window isn't open from the shot at the table but is suddenly open as seen from the outside.
When Hank answers the phone he's holding a drink in his hand, but it has vanished when he speaks to Willie Nelson.
Hank & Willie are sitting under a tree playing their guitars but when Peggy walks up the tree is suddenly several feet away from them.