How to reproduce:
Using 18.104.22.168 beta (64 bit) - 21 Jul 2014 on Ubuntu, open a Scrivener project. Select any document in it - let’s call it “document A”.
Select another document (hereafter called “document B”). Click in the header view and add one character to the title. Please note that the window title did not change to add an asterisk character ("*"), indicating that Scrivener assumes the document to be unchanged.
Click on the back button in the header view to return to document A.
What is observed
The title of document B is unchanged in the binder. Returning to document B shows that the title was indeed not saved.
What is expected
Since the title of document B was edited, the title should remain changed after leaving the document. This would also be consistent with the way the documents’ contents are handled while editing: adding one character changes it, reflected in the “*” in the window title.
Adding a character to the document notes also changes the document ("*" in the window title). Editing the document’s abstract (I’m using the German version - here it’s called “Zusammenfassung” - it’s in the top spot in the inspector) does not change the window title. Still, if clicking on a different document in the binder, the window title adds the * for a second, then removes it again. Moving back shows that the changed abstract was indeed saved. This tells me, that changes to document data and meta-data are supposed to be saved implicitly and that the issue with the title is indeed a (usability) bug.