Running Ubuntu 12.10, the problem I'm having is that when running XFCE or Openbox as my desktop I cannot seem to switch the gtk theme away from the default Ambiance.
I've tried gtk-theme-switch, lxappearance and several others to no avail. No matter what I do the gtk apps keep their Ambiance theme. I even tried logging into the regular Unity desktop and changing it from there with the tweak tool but when I log back into a different desktop everything is still using Ambiance. This is crazy, there must be a way to change them.