Querki gives a 404 to HEAD HTTP requests

Summary: Discovered by John McLeod. His link-checking software uses HEAD to efficiently detect whether a link is good. But Querki gives a 404 to all HEAD requests -- we just don't know how to deal with them.

Best fix would be if Play can automatically map HEAD requests to GET. If that doesn't work, can Apache do this sort of mapping?

See Global.onRouteRequest(), which looks promising as a way to do the translation. Alternatively, see this worked-out example of how to get it to work in Java.