Google said Panda Update 3.9 rolled out the latest update (Panda algorithm) last night 25/7/2012.
The company posted the news at mid night 25/7/2012 Twitter, said this update will affect about one percent of search results.
New data refresh of Panda starts rolling out from 25 July 2012.
The 1% of search results change enough to notice.
This is Google Panda Update 3.9. The previous update, 3.8, released just about a month ago — on 25th June 2012.
The Panda Updates were designed to remove low-quality/thin content from Google’s search results.