After trying a few things i can confirm this bug. I think its due to the version of nautilus in feisty not matching gnome version.
** Changed in: nautilus (Ubuntu) Status: Needs Info => Confirmed -- nautilus won't launch as sudo Feisty https://launchpad.net/bugs/71248 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs