Always flashing LED on NIC

I've noticed that the activity LED on my switch is constantly flashing for the link to my internal linux box. I'm wondering why this is? I've killed all known networking daemons. Unloaded the tulip.o and it stops. Immediately after modprobe tulip.o it resumes. Is this just a quirk of the tulip driver module on a NetGear fa310tx? Any help you can offer is appreciated. Ambrosius