This has been happening since May for me when one poster alerted me to the phenomena. At first I couldn't explain it. In fact I’ve been on alert for it since then. I swear that if Google would leave my sites alone I could easily retire in 2-3 years. It sometimes takes me back to pre-Florida days when everybody was happy in most forums because everybody was making money. In my case see-sawing me in and out of the supplemental results apparently makes that much of a difference. Every time this happens I say to myself “Adwords isn’t doodley” compared to what you can get out of search.