Try installing graphics/adwaita-icon-theme.
Thanks, this fixes the problem. And Leonardo beat me to rephrasing my suggestion to add a post-installation note to the gtk3+ package. I agree that during a bulk install this information will be lost, but at least you *can* find it if you are looking really hard.
-- Jörn Clausen Plattformen & Serverdienste Hochschulrechenzentrum Universität Bielefeld Universitätsstraße 25 33615 Bielefeld Telefon: +49 521 106-12601 E-Mail: joern.clausen%uni-bielefeld.de@localhost http://www.uni-bielefeld.de/hrz