Order of files to install
There is a specific order to installing KDE files.
The first files to install are the QT libraries
That would include all the libmng* files and qt* files
Then install htdig* files
Then install the KDE binaries....
Failing that, check dependencies.... gnorpm (the package manager in GNOME is easy to use that way. When it asks for depenndencies, look them up and then load them first, then the next files thereafter. Installing KDE when not part of the initial install can sometimes be touch-and-go.