no theme in particular situation

[erichardy]

This happens when c.multitheme is active, not with barceloneta. To reproduce this case, try:

• create a normal user with only Member role
• create a folder (i.e. as manager) and keep it private
• share this folder with the user
• logged as the user, go to this folder and add an element In this situation, the theme is absent, no specific error message neither in plone logs neither in browser console:

Publish the folder and everything is ok.

NB: the error message (below) in browser console is also present when Barceloneta is active:

[rogeriocdluiz]

Same problem. In private itens i got error 304 in theme css files.