Kernel Update required before updating userland programs:
2013/10/31 - new routing message version
To convert the route expire time to 64 bit, it was necessary to change the routing message structure. Make sure that you boot a new kernel before replacing the user land programs.
A small compatibility layer allows to configure addresses with old ifconfig and new kernel. Old route get also works in this setup. Old dhclient with new kernel assigns the address but hangs. Make sure to reboot your machine sucessfully during transition.