Hi again; I removed the Oxygen themes icons, these apparently came from Go-OO and were GPLd.
Crystal theme icons are LGPLd and will be removed also. This may be an interesting opportunity to get a new set of icons. I looked around and there is a set of icons under different licenses here, that may serve as a starting point: http://openiconlibrary.sourceforge.net/ But of course it would be great if a professional artist takes over a project of this nature! best regards, Pedro.