I've just tested loading gdmsetup (with 'gksu gdmsetup' command) without moving .gtk-bookmarks, and it loads fine without any error messages now. I looked in the /root directory (as root) to see if .gtk-bookmarks had been created by some other method, but it still doesn't exist there.
Having said that, on previous attempts I would get exactly what Pjotr12345 reported.
I too have a clean Hardy install with all updates applied.
I've just tested loading gdmsetup (with 'gksu gdmsetup' command) without moving .gtk-bookmarks, and it loads fine without any error messages now. I looked in the /root directory (as root) to see if .gtk-bookmarks had been created by some other method, but it still doesn't exist there.
Having said that, on previous attempts I would get exactly what Pjotr12345 reported.
I too have a clean Hardy install with all updates applied.