...The reason that you still have some default fedora icons on your desktop is that the set's author (me!) hasn't completed replacements for every default icon. You can try editing your desktop icons (right click, properties (or something similiar), and then clicking on the icon in the dialog), or just keep a watch on kde-look.org for newer versions of Altheae. Hope I can help!
Feel free to email me if you need more help! Doches@linuxcult.com