This commit will fix at least one bug (but it might fix more bugs as side effect).
http://reviewboard.kde.org/r/3092/
svn path=/trunk/KDE/kdelibs/; revision=1098658
next up is to port the Image wallpaper plugin to this and make sure it all still works and then look at bringing the wallpaper listing model/view somewhere all the plugins can share it for their configuration needs
svn path=/trunk/KDE/kdelibs/; revision=948064