Hi, kdelibs4c2a and kdelibs4c2a-kde3 cannot be installed on the same system. Why not?
kdelibs4c2a provides the old KDE3.5.10 version of various core functions; these older versions may not function correctly when a Trinity application is expecting to see the new version of those functions. A good example of this is if an application uses a task tray icon; if the old library is used the icon will not show up.
Hope this helps!
Tim