Mythbuntu 9.10 beta unbuntu desktop makes illegal users that cause PolicyKit problems

[AJ1000]

Mythbuntu 9.10 beta unbuntu desktop makes illegal users that cause PolicyKit problems when trying to reboot or shutdown the PC.

These are the steps to recreate.

1) Install Mythbuntu 9.10 and do updates
2) Run Mythbuntu Control Center and tick the Ubuntu desktop
3) Install the gnome desktop and logout and select the Gnome session
4) Do the command ck-list-sessions and theer are 3 active sessions there (rather than 1)
5) Try to shut down and it will produce a PolicyKit error (multiple active users error I think)
6) Type in the password and it shuts down successfully.
7) Reboot the machine and try to shutdown again, the error is still there.

My 9.04 system does not do this when I did the first three steps and only produced 1 active session.