bodashka - 4:29 am on Sep 18, 2013 (gmt 0)
Every single time I've looked at someone's site with an unexplainable Panda or Penguin traffic loss, I've been able to find the problem. It's usually not that complicated, most people just don't really watch the SERPs close enough or have access to enough sites to be able to tell what's going on.
I can find problems with every site, including this one. But if it causes Panda, Penguin or whatever and if any fix would return is another story. They are a lot of "experts" that claim fixes trolling on webmaster forums, but the fact that barely any site has returned from panda (unless Google changed the algo) shows it isn't easy.