When filtering for locale 'unknown' you don't get any results. STR: Go to http://input.stage.mozilla.com/en-US/ and enter some random search term, like 'crashes'. Once you're on the results page, select locale 'Unknown' from the column on the left hand side. Result: Clicking this brings you to a Search results page which says 'No results found', no matter how many results were actually found.
I can't replicate this because I can't see the 'Unknown' locale. Are you still able to replicate this? If so, could you provide some more details.
I tried to repro on FF, Chrome and Safari and could not locate the locale 'Unknown'
I think Dave Dash removed "Unknown"?
Yes, unknown was unhelpful since the filter wouldn't actually filter.