Sgt_Kickaxe - 6:54 am on Apr 28, 2011 (gmt 0)
As I see it, we can either complain and resist, or we can work to understand and adapt. This is not a penalty, it is a new algorithm - even though it generates a ranking change that looks something like a penalty.
Not only that but YOUR site doesn't even need to be affected in order for it to fall in rankings. That sounds silly but think about a house of cards, what if the sites below you that were supporting your site (via your backlink profile) DID get a ranking demotion, their ability to keep your site propped up would also change.
Panda brought on some new guidelines and we'll figure them out in time. Don't assume too much and keep moving forward and improve what you can.