Did you notice if your Google Page Rank Tool isn't working?

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Yesterday I notice that Google page rank tool on my chrome is not working. I did remove it and install a new one and it is still not working, I wonder what's wrong with Google. Are they updating something? I also tried it on Firefox, Alexa and other page ranking sites do work but Google is not displaying anything. If you are a blogger, you do often check websites and their page rank? what is your PR status?