Axacta - I too have been penalised in this update, with a site totally dropping of the radar for it's main keyword so please don't think that I don't agree with what you are saying. The point I am making is that SEOs and webmasters are always going to be open to this. Google (and other search engines too) are not going to publicly reveal detailed information about their algo as then it is open to abuse and manipulation. That is what SEOs are attempting to do anyway. It is harsh but it won't change. Google looks after number one. If they get it wrong they go down. We (myself very much included) should be very wary of over-dependence on Google.