I'm still waiting support for this...
if you look here:
selecting "dimensioni personalizzate" and using the forms with some numbers with comma, the calculation go crazy. Even in the "vernice protettica finale" option the comma seems to screw everything!
Furthermore if i try with Google Chrome the numer like 2,5 are recongnised as 25 and in Opera the number after the comma disappear. Only in Internet Explorer the number are well calculated. I really NEED to fix that.