Sansa Fuze - insufficient volume after firmware update

Interesting. I had just a doubt because when I turned on for first time my new (wow!) Fuze I was requested to choose language (chosen italian, I am italian) and region (chosen rest of the word, I am in rest of the word).

But as I knw that sometimes (as in this case) some function are disabled for laws on that region, I would like to know if “rest of the world” will preclude me some funciton and I should rather use north america…