I do have the same experience regarding on yahoo ranking.. I tried yesterday to search on yahoo and then my sites appears but then I tried it today and it says no search found. what is going on with yahoo?Is yahoo Unoconsistent with their ranking?
I too have seen my sites jump around a bit in Yahoo. Not too much but definitely more than is normal for a search engine. A little jumping around is normal - my sites typically go up and down in Google every week it seems - but Yahoo is definitely tweaking their algo here. As for the end of Yahoo, no way dude. The most visited site in the world is not going to suddenly end because they tweak their algo.
All SEs updated it's algorithm lately and that's normal to them....It is not the end of Yahoo... but update of Yahoo... Yahoo focuses more on onpage factors... the h1, contents, keyword density, etc...Update your contents and wait for Yahoo to crawl.... Then you will the see your rankings back...