Hi,

On my F22 installation, gtk3 apps ignore the gtk3 theme I set in the kcm, and always use Adwaita. The kcm seems to set "gtk-theme-name" in ~/.config/gtk-3.0/settings.ini. When I use strace on gtk3-demo for example, I see the ini file is opened, but it only tries to open ~/.config/gtk-3.0/gtk.css (missing), then /usr/share/themes/oxygen-gtk/gtk-*/gtk.css. If I kill the xsettings-kde process, then the correct theme is used (many seems to be half broken, but this isn't due to KDE...). It probably sets oxygen-gtk since I'm using Oxygen in KDE, but since gtk3.16 removed the theme engine support there is no oxygen-gtk3 any more. Unless there is an option to tell gtk to prefer settings from settings.ini, perhaps xsettings-kde should read the theme from kde-gtk-settings and only guess from the KDE theme if the value is the default one.

There is another issue with the icon theme : when using Oxygen the toolbar icons are very big (32x32, instead of 24x24 with Adwaita). I created a GTK bug (https://bugzilla.gnome.org/show_bug.cgi?id=751411).