Under certain (unknown) circumstances, Rails will give localized files an invalid content-type in the Response header. For me, after requesting corporate_information and rendering corporate_information.de.html.haml, Rails sent a content-type of de.html instead of the expected text/html.

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There are some Show archive.org snapshot discussions Show archive.org snapshot on this topic that offer workarounds, but none solved it for me.

The issue occurred with Rails 2.3.5.