We are using LDAP Authetication against a Windows 2003 Active Directory. Authetication agaist LDAP works so if I use my Windows domain username and password I successfully gain access. But if I use a correct username and leave the password blank I also gain access.
I see this was an issue in v4.1 and it was supposed to have been patched.
http://www.concursive.com/ProjectManagementIssues.do?command=Details&pid=109&iid=3002&resetList=true
We are running 5.05 Enterprise.