My replacement panel was installed today, so far the buzzing is significantly reduced so that's a good thing.
I was not home to watch them do the swap so I told the wife to make sure that they had the service bulletin and washers, and to inspect the screen for scratches before they left. Now I even told her to preface these requests with "I know you guys hate being told how to do your jobs, etc" and even with that one of the service guys was quite rude to her in each case, the first being "Well of course we have the washers, otherwise we would just have to come back months later with another new panel." (in rudeness not conveyed in text), and the second when she asked them to wait for a second while she checked the screen, "We know what we're doing, didn't you see us use blankets?"
I guess that's what you get, when I worked at an electronics shop in high school we always got calls complaining about the rudeness and condescending attitude of our outside service guy.
I was going to call and make my displeasure known, but I figure I shouldn't piss them off in case I need more service with this damn TV.