Garya - 4:20 am on Jul 17, 2006 (gmt 0)
it is the kw density but there are exemptions and that depends on yours backlinks.
You can have a high kw density but your backlinks need to not have your keywords in them.
I have one site kw density is 25% but I know I don't have the kw in the links all 800 of them site is #3. My other sites have kw density around 4% but have backlinks with keywords and they are doing well.