Version: 0.2 (using KDE 3.5.6, Kubuntu (feisty) 4:3.5.6-0ubuntu14) Compiler: Target: i486-linux-gnu OS: Linux (i686) release 2.6.20-15-generic After installing Feisty and changing the network interface eth0 from automatic to manual, the stated address did not take effect either as the current network address (since the interface is active) or in the user interface (the old address is still shown after "Apply" is selected). However, the /etc/network/interfaces file does report the change, and disabling then enabling the interface does cause the change to take effect. There should be something which tells the user to disable then enable the interface if they want the new settings, or the change should just happen automatically. The current situation makes the inexperienced user think that nothing has happened when this is only partially the case.
What app are you actually using when you say "changing the network interface eth0 from automatic to manual"? AFAIR the version of NetworkManager they had in Feisty only supported automatic IP address so I doubt this is what you mean, and I suspect you're using some other, kubuntu specific network management tool.
I'm using Gutsy now, but I'm pretty sure that it was the Network Settings section of the System Settings application. If I choose "Report Bug..." the dialogue chooses "systemsettings" as the application.
Thanks for clearing that up. It's not a network config tool from KDE, but a network config tool from Kubuntu running inside KDE's System Settings. Please report it to Kubuntu.