Hello fellow members, First of all I would like to thank anyone who takes the time to read this and hopefully respond to give me a hand. I'm the cofounder of a French Web Startup, Peoplze.com, we are a people search engine with about 3,000,000 different people indexed. We've been able to make a "name" for ourselves in our field among the french community, we've had articles posted about us on famous french blogs. All that's good obviously, but two days ago, we suddenly lost, more than 2k in traffic, and the rank of our results have been badly damaged. In the past we got a lot of organic traffic coming from Google, from people simply searching for themselves or people they know. We are currently finishing a v3 of our platform, which is far better technology wise compared to the current v2 (the one online). I wonder if Google has marked as a content farm. I think we might have also been damaged by duplicate content. We also use Ajax only navigation, and we use Google's ajax indexing techniques to get our content indexed. I hope some of you have got to the end here, and hopefully you might be able to provide some insight about the SEO mistakes we seem to have made. I'm relatively new to SEO, but I have a good technical background and understand most of the technical aspects behind SEO. All help is greatly appreciated. Yours sincerely, Xooor.