The PP link goes to the Prelude PDF by mistake.
http://helpx.adobe.com/x-productkb/global/cs6-help-pdf-available-june. html
That page has a bad link, but when I start at http://blogs.adobe.com/adobecustomersuccess/2011/05/14/help-support-pa ges-for-creative-suite-applications/ and click the link for the CS6 PDF... that is what I get
North America
Europe, Middle East and Africa
Asia Pacific