The Orcon-provided router works just fine. Trying to use a FG-60E instead. :)
I've just switched across to Orcon from My Republic, and my DHCP issues with my Fortigate 60E appear to have followed along. It does not appear to get a DHCP lease. With My Republic, it never even saw a DHCP offer. Under Orcon, I'm seeing the offer, and sending the request back, but never getting the acknowledgement.
The issue originally began randomly about three weeks ago with My Republic, and their first level guys said they'd had another fortigate user with the same issue recently.
The Fortigate happily gets a DHCP lease from LAN-based sources, but very definitely hates anything coming out of the ONT - it had been running fine for months. Any ideas/other people in the same boat? Packet capture attached.