[Samba] XP Pro client perm issues after joining samba domain

[Chris Nighswonger]

Samba: 3.6.6 PDC
Client: XP Pro SP3

Background:

1. Started with a clean installation of XP Pro SP3
2. Joined the client to the samba domain
3. Logged in as user 'root' the first time after the join.
4. Added "Domain Users" group to the "Local Admin" group on the client
(forget about the security implications for the moment)

Now when a user (any user) logs on to the client and attempt to open
Internet Explorer 8, Explorer promptly crashes.

If the local administrator is logged into the client, Explorer works as
expected.

Everything else works fine for all users including both local resources and
domain resources.

This is happening on eight clients, all with clean installations of the OS.

I'm suspecting this is a hidden permissions problem, but am really at a
loss for where to start looking or debugging.

Any help would be greatly appreciated.

Kind Regards,
Chris