Lion login screen has no "Other..." option

Hi there,

After a couple of unsuccessful calls with AppleCare, I figured I would direct my question at the community. Hopefully you guys will have a clue, because AppleCare didn't seem to!

Anyway, here's the situation: I work IT for my company and we're a Windows Server environment. Occasionally though, a user requests a Mac, and I'm happy to oblige despite certain inconveniences. In the past, Snow Leopard gave me no trouble whatsoever with what I'm doing, but with Lion it's been nothing but a pain.

So I get this new MBP, set up a local admin account, and join my Active Directory domain. That went fine. Then I log out of the local admin account, and I get this "Other..." button at the login screen that lets me type in my personal Active Directory domain credentials, creates a mobile network account on the Mac, and lets me access other network resources that require LDAP authentication, seamlessly, no problem.

Then I installed something that required a reboot, so I rebooted, and here's where the problem starts: I get to a login screen with a white background, with a gray Apple logo near the center, under which there's the icon for my local admin account and a field to fill in the password. No "Other..." option.

It looks like http://9to5mac.files.wordpress.com/2011/05/lgin-670x412.png if you want to see a screenshot.

So I log in to the local admin account, then immediately log out, and then it takes me to a completely different login screen with a dark gray patterned background with three options:

- My network account I just logged in as before rebooting

- The local admin account

- "Other..." (which lets any user in my Active Directory log in)

Once I get to that login screen, I'm fine. It looks exactly like http://a2mac.org/wp-content/uploads/images/new_lion_login.jpg except it says "Other..." instead of "Guest User" under the icon on the right. Also the icon itself shows three silhouettes of heads and shoulders (one in the front, two in the back on either side of the first one) instead of a single silhouette.

As far as I'm concerned, if I had to go this log in/log out/log back in routine every time, it would be obnoxious but not a huge deal because I have the local admin password. However this Mac is going to one of my users, and I don't want him to have the local admin password. So finally, here's my question -- how do I get to the "good" login screen when first starting up the computer, without having to log in then log out? When he turns his laptop on, he needs to be able to log in to his account right away.