Currently these are put into koffice-kexi what makes koffice-core dependent on Kexi. The dependency should be directed in the opposite way: koffice-kexi -> koffice-core. Source code for the libkrossapi.so.1 and libkrossmain.so.1 libraries is in koffice/lib/kross/api and koffice/lib/kross/main directory, respectively. The issue has been found for package koffice-core-1.5.0-1.fc5.i386.rpm Also what is the "fc6" in koffice-core-1.5.0-1.fc6.i386 that has been downloaded automatically in Fedora core 5? Thanks for reading!
Thanks for reporting... fixed with 1.5.1 push :)