I have a weird problem about the user profiles.

We have a user with a user name "isil". Somehow this profile is improted from AD
to moss as "ýþýl".

AD is installed on Turkish verison of Windows 2003 SP1, and MOSS is on English
version of Windows 2003 SP1.

Somehow when user logs in she has no problems but in some of our webparts we are
trying to generate e-mail addresses

from the user names since the e-mail address is isil@somedomain not
ýþýl@somedomain, we get errors.

My question is how to change the imported username without affecting the user's
current permissions?