VPNC: network-manager saves wrong path for CA-file in network connections config

[H.i.M]

When creating a VPN connection with the the built in network manager in KDE a wrong path to the CA-file is set. Therefore vpnc stops with an error message.

03/01/15 05:57:59 PM georg-zotac NetworkManager[863] <info> Starting VPN service 'vpnc'...
03/01/15 05:57:59 PM georg-zotac NetworkManager[863] <info> VPN service 'vpnc' started (org.freedesktop.NetworkManager.vpnc), PID 2685
03/01/15 05:57:59 PM georg-zotac NetworkManager[863] <info> VPN service 'vpnc' appeared; activating connections
03/01/15 05:57:59 PM georg-zotac NetworkManager[863] <info> VPN plugin state changed: starting (3)
03/01/15 05:57:59 PM georg-zotac NetworkManager[863] <info> VPN connection 'VPN Uni Konstanz' (Connect) reply received.
03/01/15 05:57:59 PM georg-zotac NetworkManager[863] <warn> VPN connection 'VPN Uni Konstanz' failed to connect: 'property 'CA-File' file path 'file:///home/mellhen/chain-dtag-dfn-uni.pem' is not absolute or does not exist'.
03/01/15 05:57:59 PM georg-zotac NetworkManager[863] <info> Policy set 'Kabelnetzwerkverbindung 1' (eth0) as default for IPv4 routing and DNS.
03/01/15 05:57:59 PM georg-zotac NetworkManager[863] <error> [1425229079.914541] [nm-system.c:1266] nm_system_replace_default_ip6_route(): (eth0): failed to set IPv6 default route: -7
03/01/15 05:57:59 PM georg-zotac NetworkManager[863] <info> Policy set 'Kabelnetzwerkverbindung 1' (eth0) as default for IPv6 routing and DNS.
03/01/15 05:57:59 PM georg-zotac NetworkManager[863] <warn> error disconnecting VPN: Could not process the request because no VPN connection was active.
03/01/15 05:58:05 PM georg-zotac NetworkManager[863] <info> VPN service 'vpnc' disappeared

--------------------------

After a manual change of the path in the config file in /etc/NetworkManager/system-connections the VPN connection works.

03/01/15 06:06:55 PM georg-zotac NetworkManager[863] keyfile: updating /etc/NetworkManager/system-connections/10.02.2011 version 6 Profile

03/01/15 06:06:58 PM georg-zotac NetworkManager[863] <info> Starting VPN service 'vpnc'...
03/01/15 06:06:58 PM georg-zotac NetworkManager[863] <info> VPN service 'vpnc' started (org.freedesktop.NetworkManager.vpnc), PID 2878
03/01/15 06:06:58 PM georg-zotac NetworkManager[863] <info> VPN service 'vpnc' appeared; activating connections
03/01/15 06:06:58 PM georg-zotac NetworkManager[863] <info> VPN plugin state changed: starting (3)
03/01/15 06:06:58 PM georg-zotac NetworkManager[863] <info> VPN connection 'VPN Uni Konstanz' (Connect) reply received.
03/01/15 06:06:58 PM georg-zotac NetworkManager[863] SCPlugin-Ifupdown: devices added (path: /sys/devices/virtual/net/tun0, iface: tun0)
03/01/15 06:06:58 PM georg-zotac NetworkManager[863] SCPlugin-Ifupdown: device added (path: /sys/devices/virtual/net/tun0, iface: tun0): no ifupdown configuration found.
03/01/15 06:06:58 PM georg-zotac NetworkManager[863] <warn> /sys/devices/virtual/net/tun0: couldn't determine device driver; ignoring...
03/01/15 06:06:58 PM georg-zotac NetworkManager[863] <info> VPN connection 'VPN Uni Konstanz' (IP4 Config Get) reply received from old-style plugin.
03/01/15 06:06:58 PM georg-zotac NetworkManager[863] <info> VPN Gateway: 134.34.3.9
03/01/15 06:06:58 PM georg-zotac NetworkManager[863] <info> Tunnel Device: tun0
03/01/15 06:06:58 PM georg-zotac NetworkManager[863] <info> IPv4 configuration:
03/01/15 06:06:58 PM georg-zotac NetworkManager[863] <info> Internal Address: 134.34.5.116
03/01/15 06:06:58 PM georg-zotac NetworkManager[863] <info> Internal Prefix: 24
03/01/15 06:06:58 PM georg-zotac NetworkManager[863] <info> Internal Point-to-Point Address: 134.34.5.116
03/01/15 06:06:58 PM georg-zotac NetworkManager[863] <info> Maximum Segment Size (MSS): 0
03/01/15 06:06:58 PM georg-zotac NetworkManager[863] <info> Forbid Default Route: no
03/01/15 06:06:58 PM georg-zotac NetworkManager[863] <info> Internal DNS: 134.34.3.2
03/01/15 06:06:58 PM georg-zotac NetworkManager[863] <info> Internal DNS: 134.34.3.3
03/01/15 06:06:58 PM georg-zotac NetworkManager[863] <info> DNS Domain: 'uni-konstanz.de'
03/01/15 06:06:58 PM georg-zotac NetworkManager[863] <info> No IPv6 configuration
03/01/15 06:06:58 PM georg-zotac NetworkManager[863] <info> Login Banner:
03/01/15 06:06:58 PM georg-zotac NetworkManager[863] <info> -----------------------------------------
03/01/15 06:06:58 PM georg-zotac NetworkManager[863] <info> Welcome to VPN.uni-konstanz.de.#012#012For questions: <email address hidden>.
03/01/15 06:06:58 PM georg-zotac NetworkManager[863] <info> -----------------------------------------
03/01/15 06:06:59 PM georg-zotac NetworkManager[863] <info> VPN connection 'VPN Uni Konstanz' (IP Config Get) complete.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: network-manager-vpnc 0.9.8.6-1ubuntu2
ProcVersionSignature: Ubuntu 3.13.0-45.74-generic 3.13.11-ckt13
Uname: Linux 3.13.0-45-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.7
Architecture: amd64
CurrentDesktop: KDE
Date: Sun Mar 1 18:10:36 2015
InstallationDate: Installed on 2015-01-23 (36 days ago)
InstallationMedia: Kubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140416.1)
SourcePackage: network-manager-vpnc
UpgradeStatus: No upgrade log present (probably fresh install)

EDIT:
The wrong path created by network manager is:
CA-File=file:///home/mellhen/chain-dtag-dfn-uni.pem

The correct path is:
CA-File=/home/mellhen/chain-dtag-dfn-uni.pem