Jan 29 2014
Users of OpenSUSE may especially find this update interesting:
Made a lot of symlinks for OpenSUSE's categories.
Added a few app icons.
Made some symlinks and icons for kipi (it should be fully covered now).
Added a few action icons for KTorrent.
Changed the inherited theme from hicolor to oxygen.
Thank you for telling me about "apps/application-x-clementine"! I'll make a symlink for it with the next update. For now, you could do that with this command in all apps folders and then recreate the icon cache:
ln -s clementine.png application-x-clementine.png
The forward/backward button issue doesn't happen here. The versions of Konqueror, Dolphin and KDE are all 4.11.3 here.
After searching for the icons you mentioned, I found that they belong to Gnome or other GTK-based environments, not to KDE. In KDE, the names are different and the corresponding icons are all included.