I'm having the same problem with NM in Kubuntu Karmic since an update. My solution was to restart the Knetworkmanager service it then segfault crashed, after that it just worked right again and connected to my wpa2-psk network without a problem. I have to do this everytime I reboot now.
-- knetworkmnager doesn't connect to wpa2-psk secured wlan while nm-applet connects without problems https://bugs.launchpad.net/bugs/489437 You received this bug notification because you are a member of Kubuntu Bugs, which is subscribed to knetworkmanager in ubuntu. -- kubuntu-bugs mailing list kubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/kubuntu-bugs