As far as I know, Koffice has never reach the stable stage a the moment. Maybe cause dev have jump from RC to "working on KDE4 version". So I don't know if you will found any stable koffice apps for KDE3. Like Grigorios Bouzakis have said, I guess it's time for an upgrade to KDE4. I'm using it atm, and I have no trouble. I've just no kde graphical tools for network. But for someone editing his /etc/group file by hand with vim in place of vigr, I think it's not a problem ;-)
