Something that invisibly protects from the software being used to generate false records is more a feature than a bug. "Fixing" would damage classic gaming.
Imperceptable differences that have no impact on gameplay? Sure. Leave them in. Unless you are playing on a vintage crt screen, these tiny slips are nothing compared to how diffetent modern lcds butcher classic games.
I run MAME in a converted cabinet with an ArcadeVGA card and vintage CRT. I appreciate their efforts towards accuracy, at least. Although I don't have the original cabs to compare so I also don't know any better. ;)
