Can't login after booting from Fedora 18 KDE Spin Live

Sun Jun 9 16:15:10 UTC 2013

Good day, I have downloaded and burned on DVD image 
Fedora-18-x86_64-Live-KDE.iso. After booting from the DVD a login screen 
appears where user name 'liveuser' is filled in and password is blank. 
I'm not able to log in. I tried blank password and passwords like root, 
liveuser, demo but it always brings me back to the login screen. Please 
advise. Thank you in advance. Vojta

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