Hey man, that would kinda of make sence. Where do u get this info? Do u know what the panda update takes into account?
I am sure your website hit by Google Panda Update, EMD Update or Page Layout Update....Give your website url and check your website what can be happen spamming or low quality content for penalty...
http://www.seroundtable.com/google-panda-20-15789.html According to SER, Google have Refresh Panda on November 05, 2012 http://www.seroundtable.com/google-panda-21-15918.html
It is official that there was a Panda update 2 days ago. Moreover, today Google has changed its design for Google.com, I guess that it will do the same with the other google search engines as well. So, if you are getting some strange ranking results don't worry, it's not your fault.
Given that Google make ~500 algorithm changes a year, it would be safe to assume, that yes, there was an algorithm change last night and that there might be 1 or 2 tonight!
yes friend last 10 days Panda 23 has been update on some queries, i hope you should check on google search with the keyword "latest Panda Updates " , you might have knowledge of new Updates of Google Panda . Google Panda is very secure algorithm of Google , which allow the site to be maintain on Search Ranks with clean work