Login screen reappears after login

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http://unix.stackexchange.com – I am on Fedora 16 KDE spin. Yesterday I ran the fsck command and that broke things. I can login via the tty, so I guess it has nothing to do with the shadow file. The login screen reappears after login no matter how many times I try to get past it. The permissions are the same as before. Also I have tried renaming the .kde folder. Doesn't help. This affects all the users, even root. My guess is the X server is restarting after login bringing me back to the login screen. Any way I can solve this? (HowTos)