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I received the 7/23/12 Unnatural inbound links warning but nothing changed, if anything my traffic and rankings improved well over the next 2 - 3 months. But last week a couple of the better (maybe slightly over) optimized pages suddenly dropped out of the rankings completely, is it possible that these two events are related but three months apart? A change I made close to the time of the rankings dropping was completely overhauling the homepage. I realized this would impact the internal "link juice" flow but never expected the kind of drop in rankings I received. I have restored the homepage to its former glory but it hasn't helped get my slightly over optimized pages ranking again. Any ideas? Suggestions? Exact date of drop in rankings is 18 - 19 October (site has lost roughly 50% of its organic search traffic)