kernel: em2: watchdog timeout -- resetting

I have a Nexcom firewall with Intel em nics that will not spamming the
system logs with this message:

kernel: em2: watchdog timeout -- resetting

em0_at_pci0:1:4:0:	class=0x020000 card=0x10768086 chip=0x10768086 rev=0x05 hdr=0x00
em1_at_pci0:1:5:0:	class=0x020000 card=0x10768086 chip=0x10768086 rev=0x05 hdr=0x00
em2_at_pci0:1:6:0:	class=0x020000 card=0x10768086 chip=0x10768086 rev=0x05 hdr=0x00
em3_at_pci0:1:7:0:	class=0x020000 card=0x10768086 chip=0x10768086 rev=0x05 hdr=0x00

em0: [FILTER]
em0: Ethernet address: 00:10:f3:0d:0a:db
em1: <Intel(R) PRO/1000 Network Connection 6.9.14> port 0xd100-0xd13f
mem 0xe8040000-0xe805ffff,0xe8060000-0xe807ffff irq 10 at device 5.0
on pci1
em1: [FILTER]
em1: Ethernet address: 00:10:f3:0d:0a:da
em2: <Intel(R) PRO/1000 Network Connection 6.9.14> port 0xd200-0xd23f
mem 0xe8080000-0xe809ffff,0xe80a0000-0xe80bffff irq 11 at device 6.0
on pci1
em2: [FILTER]
em2: Ethernet address: 00:10:f3:0d:0a:d9

The box in question is running Beta 1.   I have not seen commits
relating to this so I have not had a chance to update to beta 3.

Does anyone know how I can clam down this system log message?   It
does not appear to affect network traffic at all.   The device in
question is a firewall.

Thanks,

Scott