Dhcp6c 100% CPU

[mattmon]

dhcp6c process CPU utilization climbs to 100% within a few minutes of a cold boot.

Everything seems fine after I drop into a shell and kill it manually.

Installed in KVM VM with virtIO enabled from latest ISO as of 26-Aug-2014.

Yes, the attached screen shows ~60% - I was too lazy to wait for it again.

[jimp]

Which snapshot?

Anything from it in the DHCP log?

Runs fine here on my VMs.

[mattmon]

/var/log/dhcpd.log contains a lot of:

dhcp6c[13008]: XID mismatch
dhcp6c[13008]: no responses were received
dhcp6c[13008]: status code for PD-0: no prefixes
dhcp6c[13008]: status code for NA-0: no addresses

cat /etc/version.buildtime 
Wed Aug 27 00:08:55 CDT 2014

cat /etc/version.lastcommit 
d47fac4a6ffef04e55884ada3066b532e765ba88

I've replicated this on both 2.2 alpha and 2.1.4.

Unticking the dhcp6 box within interface config solves this for me, but I'm not using ipv6.