Please confirm the version of your "desktop-printing". If it is 0.17.3, which is the default version when you install FC3, then you should try to use desktop-printing-0.17.4.FC3.i386.rpm or higher, which will resolve your problem. You can find it at http://http://people.redhat.com/walters/
Or, you can browse this link http://www.linuxquestions.org/questions/history/257206, http://fedoraforum.org/forum/showthread.php?p=130875#post130875; someone have the same problem.