frakilk - 11:40 pm on Nov 28, 2006 (gmt 0)
For me there is a dramatic change across almost all datacenters and it's not a good one. My site has been thrown into the deep dark depths after months of solid ranking. I made a decision to drop a low ranking, low quality area of the site comprising of a few thousand pages (it was an affiliate datafeed store) to leave only the high quality areas of the site intact. No doubt this is the cause.