This post was found on SearchEngineWatch.com
Interesting but not surprising...
"Google says: Toolbar PageRank is for entertainment purposes only "
We just got this from a google rep. This is not helpful to me in trying to determine WHY one of our clients sites went from a Page Rank of 6 to 0. I could take it for what it's worth, and say "Oh, they launched a new site in October, therefore the pagerank just got set to zero (even though it was a 6, at the same domain name) because it's new, and I can just ignore it. Well, the thing is, the rankings went down as well. Admittedly the site has huge issues with indexability due to long dynamic url params. But, I this makes it so much harder to figure out the main culprit in the rapidly decreasing rankings. :The decrease coincides with the PR becoming 0, but also with a new version f the site getting launched."The PageRank that is displayed in the Google Toolbar is forentertainment purposes only. Due to repeated attempts by hackers toaccess this data, Google updates the PageRank data very infrequentlybecause is it not secure. On average, the PR that is displayed in theGoogle Toolbar is several months old. If the toolbar is showing a PR ofzero, this is because the user is visiting a new URL that hasn't beenupdated in the last update. The PR that is displayed by the GoogleToolbar is not the same PR that is used to rank the webpage results sothere is no need to be concerned if your PR is displayed as zero. If asite is showing up in the search results, it doesn't not have a real PRof zero, the Toolbar is just out of date"