In KDE, when clicking on an RPM file (I used rp3....i386.rpm), kpackage briefly displays a window and promptly quits. Messages in .xsession-errors: kpackage: Symbol 'rpmTagTable' has different size in shared object, consider re-linking kpackage: Symbol 'rpmHeaderFormats' has different size in shared object, consider re-linking kpackage: error in loading shared libraries: kpackage: undefined symbol: fdOpen (this is under kdeutils as bugzilla wouldn't let me say 'kpackage' as component text)
Fixed with the updated kdelibs and kpackage in rawhide.