BCM5704 routing problem

[Gardner Bell]

I upgraded my gateway last week to RELENG_8 and noticed that I can no
longer forward or receive IP packets from hosts on internal LAN.  When
trying to ping a host or the gateway IP itself, you get.

# ping 192.168.1.10
PING 192.168.1.10 (192.168.1.10): 56 data bytes
^C

--- 192.168.1.10 ping statistics ---
5 packets transmitted, 0 packets received, 100% packet loss 

All rc.conf files on gateway and hosts themselves had correct settings.

bge1 at pci0:10:9:1:       class=0x020000 card=0x164414e4 chip=0x164814e4
rev=0x03 hdr=0x00
    vendor     = 'Broadcom Corporation'
    device     = 'NetXtreme Dual Gigabit Adapter (BCM5704)'
    class      = network
    subclass   = ethernet
    bar   [10] = type Memory, range 64, base 0xdf330000, size 65536,
enabled
    bar   [18] = type Memory, range 64, base 0xdf320000, size 65536,
enabled
    cap 07[40] = PCI-X 64-bit supports 133MHz, 2048 burst read, 1 split
transaction
    cap 01[48] = powerspec 2  supports D0 D3  current D0
    cap 03[50] = VPD
    cap 05[58] = MSI supports 8 messages, 64 bit

Previously I was running 7.2 as gateway and never encountered any
problems.  I've since gone back to release 7.3 and routing works as
expected.

Any input would be appreciated.