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: fftw-0:3.3-3.fc16.i686 is oldest fftw < 0:3.3 obsoleted by fftw-libs-0:3.3.3-7.fc20.i686 [semi-automated bug report]
Fixed in 3.3.3-8, scratch build here: http://koji.fedoraproject.org/koji/taskinfo?taskID=6295838 I don't intend to push this out as an update on its own, but it's fixed in git.