Link-building Tips and Tools for Bloggers in a Post-Panda and Penguin World
ProBlogger
AUGUST 15, 2012
Later, social networks like Digg, Last.fm, and others were affected as well. Check by going to the following URL, and replace domain.com with the website’s domain. Links can do this regardless of whether or not they contain the “nofollow” attribute, contain redirects, come from a site with a high PageRank , and so on.
42 
Let's personalize your content