[Dovecot] diacritic marks in password

[pch0317]

Hi,

I have dovecot 2.0.beta6 (on RedHat 6) and my user uses thunderbird 
3.1.10 (on Windows XP).
I use authentication via LDAP (Windows server 2003 AD).

When user use in password diacritic marks (ą,ć,ę,ł,ń,ó) authentication 
failed.

What can I do?


Thanks