In Fedora 18 when opening the Terminal and becoming 'root' running Thunar from the CL opens Thunar with a warning that 'you' are running it as 'root'.
In Fedora Rawhide (to be Fedora 19) when opening the Terminal and becoming 'root' running Thunar from the CL fails with a message "thunar: cannot open display:"
What has been changed and how to change it back?