My copy of the album says Kafir without the exclamation mark. I guess different pressings had different 'spellings'. It might not be the biggest deal ever, but it annoys me to hell and back sometimes. Record companies should really put in some effort in that area of production. It's not that hard.
Mutantlizard - No, if you'd actually read the liner notes it states that it 'derives from the Arabic Kafir, commonly translated into English as 'infidel' or 'idolaters' ' No mention of the Hebrew 'kofer'.