Problems with ù,à,/ characters and similar

With Sefa 5 i had the url /le_ddr3_pi%F9_veloci_in_assoluto_da_corsair/ for the title  "Le DDR3 più veloci in assoluto da Corsair", now the url when I put the mouse on the link seems to be /le_ddr3_più_veloci_in_assoluto_da_corsair/ but in the html code the url is still the old one with %F9 and it is still the same by accesing it.

Is there anyway to fix the error with all non UTF characters? The old url with all those kind of symbols like %F9 will redirect crawlers and users to the new one with a 301 redirect?

You can have a look at www.neohw.com for see some characters "errors"

Thanks