Could be, if there are no references for boaw in the page or link, otherwise it doesn't play big role in rankings, or indexing. Sometimes search engines do that, I wouldn't worry about it. As long as you have enough inbound links, it _will_ be back. You can monitor how many pages google has indexed by searching in google for site:yoursite.com Another possibility is that you got sanboxed.. Basically it means that if you start competing for high-result keywords, your site can be sandboxed, which means that any backlinks will not be counted towards your rankings. You'd stay there for anything from 3 months to 1 year. You can't do anything if you are. Or maybe you got banned for doing something not nice. But you have to get reported to get banned, doesn't happen automatically, only manually. You can check here: http://www.iwebtool.com/. If all is fine, then all you have to concentrate on is backlinks. I have no clue about the referrer thing though. Backlinks can be checked by a google search for link:yoursite.com