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suzukik - 6:42 am on May 26, 2012 (gmt 0)
Matt Cutts announced the first date refresh of Penguin on Twitter [twitter.com].
Minor weather report: We pushed 1st Penguin algo data refresh an hour ago. Affects <0.1% of English searches. Context: http://goo.gl/4f7Pq [goo.gl]