An insufficient or ancient Obsoletes tag has been discovered in the package. It should either be corrected or dropped. The tag is superfluous, because it doesn't obsolete a package found in Fedora 16 and newer, and that package is ancient: dx-0:4.4.4-20.fc16.i686 is oldest dx < 0:4.4.4-5 obsoleted by dx-libs-0:4.4.4-31.fc20.i686 [semi-automated bug report]
Fixed in rawhide.