This is really wired... I have come across a site with PR 6 only on homepage...checked backlinks on the site & I see the site is backlinked by one PR 8 site & Google shows that all the pages on this PR 8 site link to the PR 6 site...but to my surprise the PR 6 link is no where on the site, its nowhere relavant..... the owner of the site claims of NOT having the PR 6 site link on his "HUGE" site ever....strange
Have you considered the possibility that Google is deliberately displaying incorrect information? The other option is to ask this guy what SEO company or other for that matter has had access to his site I am saying no more lol