Maybe it is somehow related to bug https://bugs.launchpad.net/ubuntu/+source/kdebase-workspace/+bug/288502 "KDE 4 doesn't respect X11 cursor themes"
Maybe it is somehow related to bug https:/ /bugs.launchpad .net/ubuntu/ +source/ kdebase- workspace/ +bug/288502 "KDE 4 doesn't respect X11 cursor themes"