Jane_Doe - 5:12 am on Oct 15, 2006 (gmt 0)

Jane, I wish it was that easy.

With my sites I usually find a kind of pattern between what keywords get hit and which ones do not. To be honest when some of my pages lose a lot of ranking positions in one update it is usually the ones that could use a little more content, less affiliate links or have something else wrong with them. There are more pages added to the web all of the time, so Google can afford to be a bit more picky about what gets in the top 10 positions as time goes by. Pages that had enough content and links to rank a few years ago sometimes just need more signals of quality to hold the same rankings today.