My micro niche site has been surviving through the past google panda update but not this round! Main pages and all sub-pages for relevant keyword ranking is totally out of the 100th SERP. Last checked on 9th Jan 2012, most of them was still on page 1 or page 2. Check on google with "site:mywebsite.com" and they are still listed in the search result. I did not do any backlinks campaign for quite some times nor any blast on it. Any helpful suggestion?