Google tweeted late last night that it has begun rolling out a new data refresh of the Panda update. The refresh affects about 1% of search results in a noticeable way, according to the company.
New data refresh of Panda starts rolling out tonight. ~1% of search results change enough to notice. More context: http://t.co/BkkCFpfR
The last Panda update data refresh we saw was in late June, and that was the second one during that month. It was a rarity for Google to roll out two refreshes to this update in a single month.
Google did, however, announce last week, that it was launching Panda for Japanese and Korean, affecting about 5% of queries (with no other languages affected at all).
We're launching Panda for Japanese & Korean. <5% of queries affected (no other languages affected today). Context: http://t.co/jfhxV5BZ
Remember, the latest announcement was just a data refresh. For more on what that means (vs. an update), see what Google's Matt Cutts had to say about it here.
For more information about the Panda update, including Google's advice, recovery stories and other commentary, please peruse our Panda coverage section.