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Cyrus Shepard posted on Google+ that all the pages on Google+ now have a PageRank of zero or not available.
He seems to be right and many webmasters are asking why. This even happens with Google Google+ page. I think the issue is that the previous URLs for these pages were https://plus.google.com/116899029375914044550/posts and now they seem to be redirecting to a longer URL and thus the PageRank scores have to pass through to the new URLs, which can take time.
If they revert back to the previous URLs, I suspect the PageRank in the Google Toolbar to return.
I personally cannot get to the old URLs to check. But maybe both URLs, new and old are not working?
Forum discussion at Google+.
Comments:
Jack Smith
03/17/2012 07:07 am
Was there any PR? I guess the PR of my Google+ page has always been Zero. Correct me if I'm wrong
Stumdomos durys
03/18/2012 06:49 pm
Is there any Chrome addon which shows site pagerank?
Darren Davis
03/19/2012 11:15 am
YEP! Download http://www.seoquake.com/ this will give you what you are looking for :) Best, Darren Davis
Shoutpedia
05/14/2012 06:07 am
The old posts of my site are showing zero pagerank. I just checked, now I am wondering what happened to them.
Joeal Manimtim
05/17/2012 02:33 am
I see pagerank on my google+ profile when I'm logged in and I can see other peoples pagerank on their post and about page. They must be in your circles. Your actual logged in url has couple of extra characters (in my case the /u/0) https://plus.google.com/u/0/111120370451741885423/about