Has anyone else noticed a big change in SERPS in the past week or two

[bassbuds]

We've had a massive change in our position, we were pretty stable on certain keywords for quite some time, however in the past week we were bouncing around and then thrown completely off with some of our keywords dropping to page 4 and some to page 2.

I've noticed a lot of changes on the google uk serps, and not sure if it is just a penguin refresh or if its a new one that hasn't been announced.

anyone else notice?

[FedeEinhorn]

There's a massive report on a new update on SERoundtable: http://www.seroundtable.com/google-update-17956.html