Comment 0 for bug 1118838

As you know Nautilus 3.6, the new System Settings (both in 13.04 come OTB), Font Viewer, Evince (soon) and more and more gnome apps in time use the new Gnome flat symbolic theming.
Here is how a toolbar with it looks like:
http://i.imgur.com/RIDKGhF.png
Here is how the normal toolbar looks like:
http://i.imgur.com/vu5fsDr.png
Now - replicating the standard toolbar theming on the symbolic one is not 100% possible (symbolic one is flat one), however there is nothing wrong with making the symbolic one dark. This is possible, see this for example:
http://www.webupd8.org/2013/01/beautiful-mediterraneannight-gtk-36.html