indyank - 8:22 am on Aug 20, 2012 (gmt 0)
Even i am yet to see or hear a story of that sort in a crowded niche. Do you think that Google's rank modifying patent for spam detection could be a reason? I don't know from where they got that idea but it looks like making any changes isn't good at all. I don't know what they monitor on a page. It could be anything like links or title or keywords used on the page, be it addition, deletion or modification.