Comment 5 for bug 805435

There is a new version of the vpnc-script that works for me, that can be found here:

http://git.infradead.org/users/dwmw2/vpnc-scripts.git/blob_plain/HEAD:/vpnc-script

Exchange it as descriped here:

http://blog.nowherelan.com/2011/10/10/vpnc-on-ubuntu-oneiric-error-either-to-is-duplicate-or-ipid-is-a-garbage/

but make sure to backup your old script!