I believe Fast Times at Ridgemont High had some changes as well. Some home video releases had different songs due to licensing but I think this was resolved by the time the film made it to DVD. The surround mix first introduced on the 2005 DVD had some minor effects changes I believe. That DVD as well as the BD does not have the mono. The original DVD and the High School Reunion DVD as far as I know has the correct original mono!
Oh yea I know all about that one too, various ambiance effects were replaced though fortunately not nearly as severe as others I’ve seen