Upgrading iproute2 makes openvpn unusable. Openvpn tries to run /sbin/ip and it fails. It's needed to recompile openvpn. Please don't forget some hosts are available only via openvpn, such upgrade make host unreachable.
vapier: you moved the binary for bug 330115, it also noted that there should be a symlink, and I think you missed that.
i responded in that bug to the symlink idea if openvpn is the only breakage, that's a known bug. iproute2 isn't the only upgrade that breaks it. *** This bug has been marked as a duplicate of bug 407195 ***