With the update of Yahoo on its algorithm and rankings, it seems most of my sites have gain some more places on its search engine while some retained its position. Good for me that this update made some significant change on the ranking system. We will see in the next couple of days if my sites who gained some rankings will stay on its achieved position.

According to yahoo blog.

Over the last few days, we’ve been rolling out some changes to our crawling, indexing and ranking algorithms. While we expect the update will be completed soon, as you know, throughout this process you may see some ranking changes and page shuffling in the index.

Better check again what has changed on their algorithm by experimenting on some aspect of search engine optimization or SEO on some free blogs or maybe a page of my site.