We have set a configuration policy to provide login and password input boxes for our laptops and desktops. After moving to Mavericks, sometimes the input boxes show up at login, sometimes it is users pictures from which to select.
Do you mean a configuration profile that determines List of users vs Name and Password under the Users & Groups Login Option under system preferences? Also, is it a Configuration Profile or Managed Preference that is pushing this setting. If it is a Configuration Profile, make sure the scopes aren't conflicting.
Good being that it is a configuration profile. Can you verify that the profile actually made it to the Macs in question? (System Preferences > Profiles) Also, are you using FileVault to encrypt your macs? As FileVault will cause the List of users vs the Name and Password text field input.
OK, further reading has convinced me that "Name and Paswd" on the pre-boot login screen that FV2 machines use isn't going to happen.
So let me alter the question... is there a way instead to "hide" FV2 enabled accounts from showing up?