I run Lubuntu 13.10 with the window manager Blackbox. I have set the GTK theme to Lubuntu-default in settings.ini:
$ cat ~/.config/gtk-3.0/settings.ini
[Settings]
gtk-theme-name = Lubuntu-default
This makes GTK3 applications use the Box icon theme; in GPicView, for instance, the toolbar icons look like this:
In Gedit, however, the toolbar icons look like this:
How do I make Gedit use the Box icon theme?