title: Where is the prefilled user name on KDE login screen stored
body: <p>We are heavily using VirtualBox on our developer workstations. Since we share the images with other developers quite often, I have tried to automate this process as much as possible (cleaning up ap-get cache, removing tmp and log files...). We are using Ubuntu 11.10 with KDE 4.7.4, by the way.</p>
  
  <p>Now I have stumbled over one little annoyance. At the login screen there is a user name prefilled and I could not figure out where this is stored. The problem is, if people get a VirtualBox image and don't realise that the pre-filled user name is not their own and enter their password a couple of time, they lock the said user on our LDAP.</p>
  
  <p>Any idea where is this user name is stored, so I could remove it..?</p>