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A few weeks ago I got an emai from Google that my site is suspected to violating Google guidelines-->suspected links manipulationg Google Page rank. My site dropped to the second page. I have contacted some of the top webmasters who link to me and they have removed the links or added a nofollow. When I asked for re-consideation I got an answear that there are still suspected links. What do I do now? I can't remove all of my links?! BTW this happened before the offical Pinguin Update.

My site has dropped from the first page top spots to the bottom second page, about 2 month ago. From time to time it reappears in the first page, is this some kind of google filter? How do I solve this issue?