Note that Ubuntu 8.10 does have a bug or two with the 'NetworkManager' stuff.
On my desktop, I used NetworkManager to forcibly config my eth0 interface as a static IP, and plugged in the desired static address. Logged out and back-in, and it reverted to DHCP. Nothing I could do to Network Manager would make it use static, and this was a desktop machine on a wired ethernet cable in a private network - static should be working without any issues. So I uninstalled Network Manager. google for "apt-get remove NetworkManager" and there are plenty of blog posts about it. Unless this is a machine that needs to bounce back and forth between wi-fi, cell-phone modems (usb/serial) and ethernet, you don't need Network Manager. > Why can't you manage it? Don't know where to edit the info or do you > receive an error when you attempt to do so? Rather then rely on some > icon how about opening System/Preference/Network config and checking > things out directly. >