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: dbus-devel-1:1.4.10-3.fc16.i686 is oldest dbus-devel < 0:0.90 obsoleted by dbus-glib-devel-0:0.100.2-2.fc20.i686 [semi-automated bug report]
Rex Dieter fixed this in dbus-1.6.8-3.fc19.