I hate when they completely tear the original version of a song off an album to replace it with the single version on subsequent releases of the album. I remember that happened to Christina Aguilera's first album twice. (Oddly enough, anytime I hear "What A Girl Wants" or "Come On Over Baby" on Muzak, they always play the original album versions.) I think it's okay to start including the new single/radio version on the album, but they should never completely replace it.