Problems with if_ixgb

Howdy,

I've got a machine running CURRENT that does not appear to want to  
load the ixgb interface correctly.  I've tried a number of things and  
I think it's a bug at this point.  The card appears fine in pciconf:

none3_at_pci6:1:0: class=0x020000 card=0xa11f8086 chip=0x1b488086  
rev=0x02 hdr=0x00
     vendor     = 'Intel Corporation'
     device     = '82597-based 10 Gigabit Adapter'
     class      = network
     subclass   = ethernet

The module loads without error, but there is no ixgb0 and nothing  
shows up in dmesg.

# kldunload if_ixgb
# kldload if_ixgb
#

Any ideas?