I have installed google toolbox for my firefox, but I anable to see the page rank in my screen. I am using ubantu. Is there something different with that?
i have ubuntu install and i still have pr info in my firefox also. its show facebook page with Pr9. 1 from google toolbar, and one another from seo quake plugins.
If you use firefox and not IE then there are plenty of free plugins that you can use which can give you an on screen page rank display.
I am using the SEO Quake service to see the google pagerank, which shows me at the right hand bottom corner for each websites.
I guess its pretty fine. I also have a Google Toolbar but I also installs "Search Status Tool" in order to check PR.
You have to activate it personally on your firefox toolbar by going to setting tab. There you will find the option for Page Rank check that box
Google is always updating and changing. Search status tool is good and very helpful. Pagerank is just that it is per page not per site. Every page can and will have a different rank.
Maybe the page you are looking at has no pagerank. if it is not working at all, you must try some other tool ( or reinstall the toolbar )