Replying to myself....
> 
> The only issue I'm seeing is that I can no longer use IPTables.


the issues seems to be the multi-port  extension, i.e.:

wormhole iptables # modprobe xt_multiport
wormhole iptables # iptables -A INPUT -p udp -m udp -m multiport --dports
68,67,53,123 -m state --state NEW -j ACCEPT
getsockopt failed strangely: Invalid argument


If I break these up into individual lines, they work just fine.

I'll double-check the recent changes, and if needed pass a note
onto the maintainer.

Sometimes you just have to talk to yourself to fix/workaround the problem...