I've had a problem with my Epiphone les paul every since I've gotten it, the low E buzzes quite a bit. Even with the action set high, the intonation set, and using heavy strings, the low E buzzes alot on every fret, and especially when played open. There doesn't seem to be any visable problems with the neck and it almost sounds like the string is buzzing off of one of the frets. Could it be a problem with the nut? Any help would be appreciated.