Every once in a while I find a track on iTunes where the sound quality is terrible.  In today's case it is Combichrist remix of KMFDM - Bait & Switch.  This is rather unfortunate because he took one of the weaker songs on the album and made it into something kickass.  Not to mention both parties know how to mix a solid-sounding track, so I think it's more on iTunes' head.  Sounds like they flattened it to mono.