It's not exactly a packaging bug - normally it's up to the $de-session to provide the components with a system-wide style and icon theme. I will add some icon-themes as recommends, that should fix it - beware of that the icon theme must set in preferences if not picked up automagically.
> Eg, "strace -efile |& grep icon" shows it's trying to find lots of icons in /usr/share/icons/hicolor/, > which apt-file search does not find in Debian. -- Alf Gaida BDBF C688 EFAD BA89 5A9F 464B CD28 0A0B 4D72 827C
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