Workaround: use https instead of http.
Resolution: handle 301 properly
Reference: http://support.github.com/discussions/site/2171-nginx-incorrectly-reports-404s-as-301#comment_3722987

Thanks for the workaround Francois, I was running into this same issue trying to use the gradle template plugin and using https worked for me too.

This affects the gradle-templates and gradle-release plugins as well since Launchpad.net redirects on artifact files.

I guess this also happens for the release plugin.

UPDATE: sorry, I previously missed other guys comments

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Thanks again for reporting this issue. We haven't heard back from you after our inquiry from November 15th. We are closing this issue now. Please create an issue on GitHub if you still feel passionate about getting it resolved.