If I use dconf-editor to change the way File/Folder permissions display in Nautilus (dconf-editor = org > gnome > nautilus > extensions > preferences > show-advanced-permissions) and then bring up the properties of a folder (e.g., right-click a folder and select properties > permissions) the Permissions-Tab always has dashes in it under the "File Permissions" Section (see Screenshot).

Even when a folder's content is not "mixed" with respect to file permissions, the Permissions-Tab always shows the content as mixed (i.e., with dashes). This should not be. If all a folder's files have been marked so that only the Owner has read/write access, then the folder should display this in the properties. Currently, even if a folder contains only one file, the Permissions-Tab shows Mixed Content.

Users wishing to control file permissions of all files within a folder have no way to find out if "mixed content" exists in the folder because the Permissions-Tab always shows "mixed content" regardless of whether mixed content actually exists or not in the folder.