Fedora 15 machine accounts show at login
I recently upgraded my Fedora server from 13 -> 15 and imported all the linux and samba accounts from the old setup.
I have the machine operating as a domain server for my network using samba and tbm files for storing user info for samba.
I now have all the machine accounts (machine$) show up at the login screen after startup as well as the user accounts.
How can I hide these machine accounts like before?