topstar - 6:59 pm on Jul 28, 2012 (gmt 0)
As of today most of my article pages have been filtered down, dropping from page 1 to around pages 20 to 50. Sometimes the site's index page outranks the article. Only a couple of articles still hold their previous ranking.
It's a query specific filter: "blue widgets" has been dropped but "blue widget" may still rank.
I am totally clueless as to what has happened and why.