I read on a message board recently that Yahoo had made some changes to it's ranking algorithms (whatever those are!).  Several agents on that board mentioned that they had seen a drop in their ranking on Yahoo.  I was on the top of page one of yahoo for certain key words for a long time and now I've dropped to the bottom of page two.  I thought perhaps that it was because of several small changes I made to my home page, but now I'm wondering if it's due to this thing with yahoo instead.

Does anyone know anything about this and how I can improve my ranking again?  I've seen a serious decline in my website traffic.

Thanks!