My OS X Server 10.2.3 system went through a power outage a few days ago. I rebooted it this morning and it dumped me into the console login just before showing the normal login screen. A look at system.log shows the following: loginwindow: AuthorizationRef doesn't have a userID loginwindow: exiting to console WindowServer: loginwindow connection closed; closing server. I tried a couple of things (fsck, diskutil repairPermissions) before looking at the system log. After that I tried deleting these two files:
/Library/Preferences/com.apple.loginwindow.plist ~/Library/Preferences/com.apple.loginwindow.plistThis fixed the problem -- a good thing, since I'm not sure what I would have done next!