“Allow administration by:” not working in 10.5.1?

I have a group of mobile users in the MYDOMAIN\developer group. I’ve set up Active Directory in Directory Utility, checked the “Allow administration by:” and entered “MYDOMAIN\developer”. Users authenticate just fine, but don’t have admin privileges. When I look up the users in Directory and click on the Goups tab, I see they are all listed as member of “None”. When I look up MYDOMAIN\developer in Directory, it say “Membership not published.”

In Console, I see DirectoryService.error.log has a few entries like:
2007-12-17 14:55:10 CST – T[0xB0103000] – Active Directory: Could not find GUID for MYDOMAIN\developer to update admin group

Is anyone else having this problem with OS X? Any idea on where the problem is?