Sorry about being unclear. Clarifications:
LAN is vlan0, OPT1 is vlan1
I added pass all rules, meaning pass on any proto, any destination, on both LAN and OPT1 interfaces.
The tcpdump was looking for DHCP protocol packets, I used this command: tcpdump -i <if>port 67 or port 68
The log excerpt was from the firewall log, forgot to say there was a green pass icon too. Sorry.
The DHCP-specific rules that I added (on both LAN and OPT1) was "PASS UDP from anywhere, to anywhere, port 67-68".
Again, excuse me for being vague, and thanks for your time.</if>