From Bugzilla Helper:
User-Agent: Mozilla/4.75 [en] (Windows NT 5.0; U)
Description of problem:
Cannot unlock X (GNOME and KDE) with the root password when logged in as a regular user.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1.Login as a regular user (runlevel 5)
2.Lock the screen
3.Try to unlock with the root password
Actual Results: Did not unlock
Expected Results: Should unlock
Might also be a PAM bug (/etc/pam.d/xscreensaver). Don't know.
*** This bug has been marked as a duplicate of 19958 ***