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: kde-filesystem-0:4-38.fc15.i686 is oldest kde-filesystem < 0:4-36 obsoleted by kde-filesystem-0:4-46.fc20.i686 [semi-automated bug report]
This is a versioned self-obsoletion for transition from kde-filesystem.noarch as shipped with Fedora 14 to the arch-specific kde-filesystem builds in Fedora 15 and newer. The Obsoletes is correctly versioned (covers exactly all the noarch builds).
So, it's ancient indeed, since Fedora 15, 16, and 17 (all have reached EOL) have obsoleted the old build from Fedora 13 already. Thanks for listening.