If you ask Nautilus to view a text file you get a (very long) pause then the text file is displayed. The left hand area where you get "view with" buttons shows only a narrow bar of button top/button bottom but with no actual options in it.
I'm not sure I understand exactly what you mean, but I did the following: - log on - type /etc/X11/XF86Config into Nautilus location bar - XF86Config is displayed and I have "Open with gedit" and "Open with..." buttons in the sidebar So I think it works for me...
Reopen if we figure out how to reproduce