title: Facebook Graph API "search" by email suddenly stopped working
body: <p>We have an application that issue search requests (FB Graph API) using an email address as the main query parameter, so basically we are searching users by email (e.g. /search?q=email@dot.com&amp;type=user). Everything was working perfect until yesterday when suddenly we started to get 0 results from that request. We are not aware if something has changed on the way the search API works, or if without previous notice that feature is not supported anymore. Does anybody else has had the same issue, or has any info about it? </p>