I installed Ubuntu 7.1 a while ago on my Dell Vostro 1000 using the very helpful instructions I found here and here. I just reinstalled 7.1 today, however, and now the wired network connection doesn't work. None of the other instructions cover this eventuality (in fact they require the wired network to be working in order to get the wireless up & running). There's definitely no problem with the cabling or router that I'm using (tested with a couple of winxp systems).

Can anyone give us a hand with this? I'm not really that sure how to troubleshoot it

Much obliged