turbocharged - 10:11 am on May 17, 2013 (gmt 0)
Panda has made it much easier for scraper sites to steal content, republish and rank it on their un-pandalized domains (even if they link to you - the source). To confirm your site has been hit by Panda, look for sudden drops in past traffic and try to match up to a Panda release date. The fix would be to re-write over optimized content on your site. Your EMD also likely intensifies the Panda effect.