Yahoo has been really pretty strict with AdSense sites. I have observed this just this hour... from a # 356 i was at # 352 with respect to search results.

After 1 hour more i was again at #356...

With Google i was at #14, after an hour i was at # 12...

With MSN i was at #14 also and became # 12 after an hour and still holding.

How about you guys out there????Anything Special yet????

have no problem with Yahoo and my sites have Adsense

Lots of keywords in top 10 in Yahoo SERPs

This would make sense to me. We recently began running adsense on our site and saw a huge drop in our yahoo returns.