There are numerous instances of boom mic visibility are only found in Full Screen or Pan & Scan versions such as VHS and Rhino's DVD release. (The most recent Paramount DVD presents the film in its proper matted Widescreen format, eliminating the boom mic visibility errors.)
In the final scenes where Sheriff Pusser drives a police car to the Lucky Spot, just before he arrives, in the long shot of him driving down the highway, the patrol car has red lights on it's roof. When he arrives and drives the car through the bar, the car has blue lights.
Before Callie is killed by Pusser, she tries to kill him with a shotgun hidden under a pile of clothing. She fires twice, Pusser ducks, then he kills her. In the process, Callie's blasts blow huge holes in the wall several feet wide behind Pusser, yet miraculously, no one on Callie's right sitting at the bar was hit by these stray blasts.
When Buford goes into the Lucky Spot with his stick and begins to hit the men, it is obvious that he is not using a stick to hit them with because it is flexible. It appears to be made of foam. In non-contact shots in the scene it is a real stick.