PageRank reflects our view of the importance of web pages by considering more than 500 million variables and 2 billion terms. Pages that we believe are important pages receive a higher PageRank and are more likely to appear at the top of the search results.
I checked Impressions and Clicks going down.
See:
[slide]http://imgclub.org/images/chec.jpg[/slide]
http://www.wjunction.com/member.php?u=12786CloudShadow its possible excess of keywords?
Example thread: http://www.warez-4ever.org/f8/switchfire-518630.html
Due to Google Algo changes, there are many warez sites whose Organic Traffic is affected badly.