thanks a lot for all the answer that you are giving to me!
Today i have a new question... i have a lot of accented characters, like à,ò,è,ù, and the browsers of my nation (italy) are set to ISO-8859-1, on the article body i see that with this characted code, they appear alle messed up, but they appear well on navigation menù. If i set up UTF-8 on my browser, the accented letters on the navigation menù are messed, but i see clearly them on the article body...