I've been using Ubuntu 12.04 for a few weeks and recently added the xubuntu desktop as well. I have noticed that in some applications, there is no menu present. For example, in Thunar, their is no menu (File, View, etc.), so I can't figure out how to "show hidden files." Could this be some conflict between xubuntu and unity's global menu. I want to be able to log in under either on my netbook, so uninstalling one or the other is not an option. Any ideas?
I think I solved this particular problem. I was having problem with a lack of menus in gnome-shell as well. I went into dconf editor, clicked on 'org' then on 'global menu.' I then unchecked the 'enable global menu' box. Since then, I have been able to see menus in both xubuntu and gnome-shell. I haven't noticed any loss in functionality in global menu when I'm logged into Unity. Thanks everyone for the answers.