Didn't see it anywhere else yet, it's pretty recent as far as an official Google release goes:
Official Google Blog: Finding more high-quality sites in search
Google Forecloses On Content Farms With “Farmer” Algorithm Update
Anyone affected?
Official Google Blog: Finding more high-quality sites in search
Google Forecloses On Content Farms With “Farmer” Algorithm Update
But in the last day or so we launched a pretty big algorithmic improvement to our ranking—a change that noticeably impacts 11.8% of our queries—and we wanted to let people know what’s going on.
This update is designed to reduce rankings for low-quality sites—sites which are low-value add for users, copy content from other websites or sites that are just not very useful.
Officially, Google isn’t saying the algorithm change is targeting content farms. The company specifically declined to confirm that, when I asked. However, Matt Cutts — who heads Google’s spam fighting team — told me, “I think people will get the idea of the types of sites we’re talking about.”
Anyone affected?