Disable NAT bug
I turned off NAT via Firewall->Nat->Outbound + enable advanced outbound & delete default rule method suggested on this forum. I noticed that all my traffic still appeared to come from the Wan interface IP. So then I checked System->Advanced->Disable Firewalls Alltogether and saved. After that, I noticed I could only ping adjacent nodes on Wan in the gui, but I could ping multi-hops in from the terminal/shell just fine. So I unchecked "Disable Firewalls Alltogether" but no change, and I noticed that in the GUI Firewall->Nat->Outbound is now a blank page.
This was fixed just a few days ago. cvs_sync.sh releng_1 if you have a full installation.