title: Android facebook login works on debug mode, never in release
body: <p>I've developed an app for android and now its time to make a release version. But while I have no problems while debugging, I never could make work the releases. I've tried one hundred times by following this guidelines and they always led me to have keyhashes not working using facebook. Is there any kind of suggestion for cases like these? I've searched everywhere, but never found the key to get it working.</p>