Upgraded from 2.1.5 to 2.2 RC and most went OK. However I found, what I think is, a bug.

I have 3 interfaces.  WAN (IPv4 only, DHCP), LAN (IPv4 and IPv6, both static IP) and TUNNELBROKER (IPv6, static IP connected via GIF-tunnel to Tunnelbroker.net)

After the upgrade the system has auto-created a dynamic IPv4 Gateway called "TUNNELBROKER_TUNNELV4"
(which is tied with IPv4) for my TUNNELBROKER IPv6 interface. But as said, this interface is a pure IPv6 and
NOT IPv4 so this dynamic interface should not have been created at all.

The only way a dynamic gateway should be created is if I, on the TUNNELBROKER interface, define IPv4 as DHCP.

It is not possible to remove (only possible to disable).  If I disable it and then remove it, system recreates it again.

See attached screenshots.

UPDATE:
Could possible be the same/similar as reported in #4102
https://redmine.pfsense.org/issues/4102

"Now, with 2.2 RC, a bogus $IFACENAME_TUNNELV4 dynamic gateway gets created in addition to $IFACENAME_TUNNELV6…"

Best regards
Dan Lundqvist
MRZAZ.COM
Stockholm, Sweden