Did they release another update to the way google ranks websites? Ive noticed over the past few days some websites seem to bounce from ranks one to page two etc. This high rate of fluctuation makes me wonder what bases determine a websites's rankings and whether changes in the results are determined by changes made in Google's system or within the websites itself. If I had to guess, I believe this determination is based on a combination of changes both within Google and persistent tweaking of a website that could keep it balanced somewhere on page one.