I just updated to Kubuntu Intrepid and everything worked nice. I’ve run KDE4 for like six months and I’m very pleased with it. A not so nice bug in Intrepid / KDE 4.1.2 though is that when i suspend/resume my laptop I loose all my mouse settings. I have to go into System Settings -> Keyboard & Mouse -> Advanced and change pointer acc or something and then Apply.
Kind of annoying. Right now I don’t have any solution for this.