I just posted a similar question in the Google Adwords section, but I have the same problem with my Yahoo account as well. I originally just had the Search network option enabled on my account and my CTR was great, but earlier today in an effort to get more traffic, I enabled the Content Network feature and in hours saw my CTR drop severally. My question is should I create separate accounts or campaigns for search and Content networks? Any help would be appreciated. Thanks Veronica