Yahoo search index update

I havent seen much of a change in Yahoo during the update, had more changes during the last update.

 

I haven't noticed any difference, does yahoo favor backlinks more than google?

 

After a year of climbing, all my sites went down last week, and some totally disappeared.

How can i get them back up?

 

Yep, looks like there is an algo change in progress.

Here's the official word from yahoo from a week ago:
www.ysearchblog.com/archives/000525.html

 

some of mine rank better and some do not, so cant tell if it is related ...