I don't quite understand that. Why would some of my inner, inconsequential, pages have Pr5? I even verified http://www.seologs.com/pr-check/pagerank-dc.html here. Is it my linking structure? But, I thought PR was all about back links.
I had same problem till yesterday. One of my site had 18 PR3 inner pages, but index was showing zero. However, yesterday it gained PR5, but only G knows whether it will change again.