The updated kdebase package (1.1.2-11) requires libqimgio.so.0. Unfortunately, I do not know what package provides such a library. So one can not update kdebase. Also, I could not find any reference to these kde 1.1.2 update packages under www.redhat.com (RH6.0 gebneral errata, etc).
please get the updated qt1x packages.