Many webmasters and advertisers still rely on Google pagerank as an important metric to determine value of their URLs, and may have noticed that their 3rd party tools are not functioning. Dave Naylor, who runs a leading UK SEO Agency, informs that the lookup URL has merely changed from:
http://toolbarqueries.google.com/search?client=navclient-auto&features=Rank&ch=8f3b58e04&q=info:www.hyperdogmedia.com
to
http://toolbarqueries.google.com/tbr?client=navclient-auto&features=Rank&ch=8f3b58e04&q=info:www.hyperdogmedia.com
Hopefully you see the part to change. Some third party pagerank checking tools are probably not being updated, and their users may feel left out in the cold. For everyone else, be sure to check with your vendor for their next update.