The new source navigator icon sn_logo.xpm is taken from:

http://www.blog.mediaprojekte.de/grafik-design/opml-icon-vorschlaege/

(c) by Ole Wiemeler, released under Creative Commons Attribution 2.5 License
It has been slightly adapted.

and

Most other icons are taken from (or based on) the Tango! project:

http://tango.freedesktop.org/Tango_Desktop_Project

(c) by Tango Desktop Project under Creative Commons Attribution-ShareAlike 2.5 License

and

A KDE icon theme named bctangokde

http://boskastrona.ovh.org

(c) by Bosky Cinek under Creative Commons Attribution ShareAlike 2.5 License
