I encountered the same problem, including icons, window decoration and even wallpaper.
There is a forum post discussing the same phenomenon, and the temporary solution is to change it from an opened window (right click on the title bar and configure window behavior from there), it works for me. Here is the post link: http://ubuntuforums.org/showthread.php?t=112579&highlight=change+decoration -- kcm windows decoration: selected KDE2, but it's plastik https://launchpad.net/bugs/23860 -- kubuntu-bugs mailing list kubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/kubuntu-bugs
