socialerts

So I have a few questions on answers.yahoo with links to my site (where my answer is relevant to my questions)

For a long time I was able to see that these questions were ranked on google for various keywords but last week or so they took a big hit on SERP.

Was wondering if anyone else noticed SERP changes for yahoo answers? (I didn't "push" these answers via backlinks, social or anything - google simply ranked them)