I was playing my Fender Jazz bass (American Original if that helps) the other day and noticed that some of the tuning peg nuts on the front of the headstock look slightly raised (see photo). They may have always been like this, I just never noticed. When I changed strings I pushed the nuts down as much as I could, but they look slightly raised again now that the strings are on. The tuners don't feel unusually loose when the strings are off and the screws are all pretty tight. The bass plays fine. I don't want to seem anal (the appearance doesn't bother me), I was just wondering if it's a problem and could cause any damage or is it just a cosmetic thing?