Unicode characters in password

[Marvin Cotto]

Hello
I am working on software which uses kerberos as authentication system.
Clients request to support non ascii characters in passwords. If i try my
(windows)  client against active directory unicode password works perfectly.
But when I try it against linux where is mit kerberos it allows me to change
password to some "unicode" but the password doesn't work.
My question is if unicode passwords are supposed to work in kerberos? And if
not which part of rfc says so?

Thanks a lot

M.