I'm also affected by this bug.
But I'm not yet sure how to fix it.
Disabling the 06_stolen_from_head patch disables more changes than necessary but should also work for network-manager-vpnc users.
Adding the option to disable dpd is the better fix but only useful for those using vpnc-connect. network-manager-vpnc users are left out (or at least I didn't find a option to specify additional parameters).
I'm also affected by this bug.
But I'm not yet sure how to fix it.
Disabling the 06_stolen_from_head patch disables more changes than necessary but should also work for network- manager- vpnc users.
Adding the option to disable dpd is the better fix but only useful for those using vpnc-connect. network- manager- vpnc users are left out (or at least I didn't find a option to specify additional parameters).