I recently launched a new directory website http://www.webhosting-directory.org I have noticed today that one page has got a PR2 that is http://www.webhosting-directory.org/home/ All others haven't got anything. New for you?
Don't worry about your PR .. just keep on working on getting new quality incoming links and your PR will increase automatically
You need to set up the Google Site Map asap. It really helps the indexing. We also have internal pages that are PR 4 but the main site dropped to PR2. Google is just being Google? Or did the bots hit an erron on the index and could not finish the update. The Google Site Map has a good error reporting section that give you a good idea what is going on within you site. Ours was the server being down for 4 hours not Google. Jim Catanich