= bug description =

$ curl --verbose --write-out %{http_code}\n%{content_type}\n%{filename_effective}\n --insecure --retry 10 --retry-delay 2 --compressed -JOL http://pkgs.fedoraproject.org/repo/pkgs/ocaml-ulex/ulex-1.1.tar.gz/ce49a013bc4a0e085977a9fe157017bf/ulex-1.1.tar.gz

says

snip
< Content-Type: application/x-gzip
< Content-Encoding: x-gzip
snip

but

$ file ulex-1.1.tar.gz
ulex-1.1.tar.gz: POSIX tar archive (GNU)

= bug analysis =

This causes scripted downloads to fail. Particularly, the OCaml Package Manager, OPAM, uses https://github.com/OCamlPro/opam-repository/blob/master/packages/ulex.1.1/url this URL and fails to gunzip the tar.

= fix recommendation =

Edit the Apache config which probably contains an AddEncoding directive on files that match *.gz or something similar. This is not necessary and confuses clients (browsers do frightening and terrible sniffing that scripts shouldn't have to).