Penguin 3?

A lot of truth in that comment. Google updates are always going to contain changes that will harm many sites that are doing things "right." Everything is a numbers game. Google isn't manually reviewing every web page on the Internet. Their algorithms aren't geared to be 100% effective as that's impossible with those kinds of numbers. Google will never get it 100% correct, so there will always be some collateral damage.There are billions of web pages on the Internet, so even if it's just a few percent of pages that are wrongly hurt by an update, that's still 10s or 100s of thousands of pages that wrongly drop in rankings. Each webmaster that's hurt by an update will be outraged and feel wronged, but Google is thousands of engineers looking at things from a numbers, odds, percentage, engineering way of viewing things, and with that in mind they are going to simply accept it as fact that there is always going to be some bad along with the greater good (from their perspective).