I was upgraded My Kubuntu 8.04 (with mixed KDE 4.1.2) to Kubuntu 8.10, 2 days ago!
yesterday, wireless connection to my ADSL/Access Point dropped periodic and get connected again.
today my connection dropped and it cannot connect again! even Wired Connection! and my laptop cannot connect to network!
after that, i ask for it on Kubuntu IRC channel, and they say remove /etc/network/interface file, and restart system.
so, it connected again. but just for a while!
and after that I have to restart NetworkManager service to get connect again! and after a while my connection dropped and cannot connect until i restart NetworkManager service.
My system is Dell Inspiron 6400 Laptop.
Is there any idea?