Hi,

>> Feb 23 11:07:01     /kernel: sk0: watchdog timeout
> 
> I had the same problems since I bought two Intel Net Cards.
> First I used two cheap Realtek chips and always had that message to 
> console.
> 
> Which cards are you using?

I don't know exactly, and I can't look right now.
But the log says:

/kernel: sk0: Ethernet address: 00:0a:5e:xx:xx:xx
/kernel: sk0: <Marvell Semiconductor, Inc. Yukon> on skc0
/kernel: skc0: 3Com Gigabit NIC (3C2000)
/kernel: skc0: <3Com 3C940 Gigabit Ethernet> port 0xdc00-0xdcff mem 
0xfcf00000-0xfcf03fff irq 7 at device 4.0 on pci1


greetings,
  Harry