Thanks for the info Rusty. You seem to have it working, yet I don't. The system is tied up with a long download at the moment, but as soon as it is free I'll try following your steps. Any insight on what might be different? Different video driver perhaps? (I have an Nvidia Gforce 3 card in the system in question; I will have to test it on an ATI based system as well). This is really bugging me, both because I find Knoppix and ethereal a very handy networking debigging tool, and simply because it used to work in older versions and it still should work. I'll post back when (and if) I know more.