The culprit:
/home/bruno/.local/share/applications/Swiftfox.desktop
Had edited all the .desktop files it complained, still crashed, removed Swiftfox.desktop, it now complains about a lot more .desktop files but doesn't crash and I can now run KDE4 System Settings.
Seems the .desktop files were'nt guilty, at least in my case. Will try KDE 4.0.2 now.
The culprit: .local/ share/applicati ons/Swiftfox. desktop
/home/bruno/
Had edited all the .desktop files it complained, still crashed, removed Swiftfox.desktop, it now complains about a lot more .desktop files but doesn't crash and I can now run KDE4 System Settings.
Seems the .desktop files were'nt guilty, at least in my case. Will try KDE 4.0.2 now.