Nothing has changed EXCEPT my keyword density...all h1, h2, bold, proximity issues stayed the same, as well as great anchor text backlinks (mine over 400, my competitors I speak of, below 50)....the ONLY change to my site or theirs (and I keep close tabs on theirs) is an increase in KW density to my site. I'm thinking that because I have so many backlinks, compared to my competitors, and I have perfect anchor text, that those two things added to high kw density throws me down...as if over-optimized. Clearly if you read what I wrote about my #1 competitor, who I am not even trying to beat, their site has the backlinks factor and zero kw density. I guess we'll only know when the results change. I'll let you all know what happens. It will be a valuable experiment at the very least for all of us.