lucy24 - 10:30 pm on Apr 26, 2012 (gmt 0)
When I saw the "13" in the thread title my instant thought was: typical SERP containing 10 pages plus three images,* bumping you down to the second page from the first page. But, ahem, if you're now at #13, where were you before the penalty? x + 13 = ?
* There was a recent thread about this. If you have a page that would come up in both the top 10 for text and the top 3 for images, they leave out the images.