1. PR has not been updated on the toolbar for 2 months
2. The toolbar PR is what Google choose to show us and may not bear any relationship to what they use internally (PR is actually on a log scale)
3. Sometimes the PR is different for a site if you visit is with and without the www in the url or with or without the /index.htm (or whatever) attached - this is usually a temp prob and Google fix it eventually.

CBP