Unfortunately, it is well-known bug for Fedora, affecting both 18 and 19. You can read about it here. It is basically a complaint that your GE package is attempting to do something (most likely, installing some programs) with /usr/bin, which is owned by another package. The notion of ownership of /usr/bin sounds very strange to me, it seems reasonable that this is security issue, but I do not knwow of any way to solve it. A workaround for Fedora 19 is provided toward the end of the page I referenced above,
yum install http://dl.fedoraproject.org/pub/fedora/linux/updates/18/i386/rpmrebuild-2.9-1.fc18.noarch.rpm
Careful, some of the work-arounds suggested for Fedora 18 early in the thread are later said to be useless in Fedora 19. The only one known work-around for Fedora 19, AFAIK, is the one above.