Netware 6, Citrix PS 4 on W2003, Novell Client 4.90 SP2 und 4.91 SP2


we are facing a lot of issues, when changing our user names to the
format "firstname.lastname".

- login to a citrix server (with ICA full client) does not work any more
- login via LDAP to a citrix server using the web interface does not work
any more
- ZENWorks: an application bound to a OU is not visible for a user with a
dot in his name (if it is bound via groups, then it is visible)

Any ideas about that

Thanks a lot.