Dougy - 7:16 pm on Dec 7, 2004 (gmt 0)

I'm not sure whether this has been discussed recently, but i have noticed that search terms i have been optimising for over the past month appear to be dropping as opposed to gaining positions in the SERPs.
This could be considered normal as google may consider it as keyword over-optimisation, but terms that i havent optimised for a while now are still ranking in roughly the same positions.
Has anyone else seen this trend