Forum Moderators: Robert Charlton & goodroi
The theory is that the pagerank that you pour in from different inbound links gets distributed across higher number of indexed pages thus assigning smaller PR to each page and thus ranking it lower.
I have a theory I'd like to check -- is whoever got hit by this update also seeing an increase in the number of indexed pages on at least one datacenter or the primary google at the same time? Just plain "site:yoursite" thing.
That has been my experience so far with this update. Pages indexed increased by 25%, referrals decreased by 75%. Don't know if they are related.