Comment 13 for bug 415076

I can confirm this too on Kubuntu karmic - no place to enter the passphrase for a x509certificate based connection and no prompt for one.
I can also confirm that the connection failure is due to 'no vpn secrets' according to syslog

This connection works fine from the command line (using a .ovpn file) and also works fine in Ubuntu karmic using the same certificate and key files as tried in Kubuntu. In Ubuntu the nm-config page for openvpn has space to fill in the passphrase which is then used without any problem