I've been upgrading all our iMacs to Mt Lion this week. I've done about 8 successfully but hit an issue with the latest one. After the upgrade the computer won't bring up the login screen. I've checked the group in WGM and it is set correctly. All the other computers in the group connect fine. I even deleted the computer and re added it. Still nothing, just boots right into the local admin.

I tried rebinding it to the network account server and still no luck. It just goes right into the local admin account every time. Never even brings up a login screen. It does have a green dot for the network account server, so it sees it fine. It just won't bring up the login screen.