Yes and no. All the computers are connected through a gigabit switch (also a Netgear product). The switch is connected to a Linksys VPN router which, in turn, connects to my ISP through a DSL modem.

A router problem could, I suppose, explain the Internet problem, but it wouldn't explain the 10mbps link. I've even tried re-setting the gigabit router to see if I could "jog" the card into realizing it had a high-speed connection, but that didn't work either. I think that when the card is pluged in it causes some kind of bug in the TCP/IP stack, but I haven't a clue about how to deal with it.