On the other hand, wasn't Lars the driving force between the terrible mastering of their more recent albums? I remember reading something where he said basically that because he didn't personally hear any clipping and it sounded good in his car that it was good.
From what I understand, Rick Rubin wanted it mastered that way so it sounded "louder" (yet another casualty of the loudness wars) and the band just went with it. Unfortunately, the average consumer (or band member apparently) couldn't care less about audio quality, so it is no surprise that Lars has no qualms about it.
