I have a MAC OSX version 10.5.8. It was binded to a Windows 2003 AD and worked fine. I unbinded it from the Windows 2003 AD and binded it to a new (different domain name) Windows 2008 domain. But when I attempt to login to with a domain account the login box just shakes like the password is incorrect. The strange thing is i performed the exact same steps on another MAC (earlier version) and I can log in fine. This tells me that it is not an AD problem, but a MAC machine problem. The only weird thing on the MAC is in the Directory Utility it says "This server is responding normally. This server is not in your authentication search policy". But the domain is in fact listed in the Search Policy for Authentication and Contacts. I can also search the directory for users successfully.
The domain has a .local name and I read that may be a problem but could not find a fix. But again I did successfully login in to the new .local domain with another MAC.
Could there be an issue with version 10.5.8 and binding to a second domain?