When downloading the help-pdf-files for Production Premium CS6 from http://helpx.adobe.com/content/help/en/x-productkb/global/cs6-help-pdf -available-june.html, you may have noticed that the manual for Premiere Pro is as yet not available on that location. In fact, clicking on Premiere Pro gives you the manual of Prelude. However, when you manually change the URL from http://helpx.adobe.com/pdf/prelude_reference.pdf to http://helpx.adobe.com/pdf/premiere_pro_reference.pdf you get to the right location! (Note the underscores; not spaces)
It appears that the Help Files for some other CS 6 programs, are still missing, broken, or leading to previous versions. Not sure what happened (rolling out the Creative Cloud too?), but things are not working, as they should. The Help Files have been a big bone of contention on the Photoshop Forum, as well, and I am not sure if that has been resolved yet.