I have a completely new installation of Kubuntu 14.04 here, and Gnome dependencies for Network Manager aren't installed. In so far, I can't have any faulty old configuration files. Also compare http://forum.ubuntuusers.de/topic/openconnect-mit-nm-plasma-fuehrt-zu-segfault-i/ – the OP is in German, but I included a lot of console output that will hopefully be helpful.
I have a completely new installation of Kubuntu 14.04 here, and Gnome dependencies for Network Manager aren't installed. In so far, I can't have any faulty old configuration files. Also compare http:// forum.ubuntuuse rs.de/topic/ openconnect- mit-nm- plasma- fuehrt- zu-segfault- i/ – the OP is in German, but I included a lot of console output that will hopefully be helpful.