The minidlnad package for arch linux, intended to allow minidlna to be run as a local user, is broken. The package conflicts with minidlnad in the required package "minidlna".
I know nothing about arch packages, but it seems the package name line needs to be changed in PKGBUILD, or the install line needs to be changed so that it won't try installing a script file named minidlnad over the binary by the same name that is already there (installed by the minidlna package already).
The script file minidlnad needs to be changed as well, it refers to a minidlna executable binary when it should refer to minidlnad.
I hope that helps, I am a total beginner. Attached is a patch file from minidlnad.old to minidlnad.new, showing where the corrections need to be made (currently running this script in ~/bin/myminidlnad but I didn't mess with the packaging system).