Internet explorer 9 with tabbed browsing will not display the full website URL in the address bar. The address bar is displayed as shown below with partially hiding the webpage URL. And this will not be an issue if the tabbed browsing is disabled in Internet Explorer.
Another way to overcome this issue is to display the tabs on a separate row. This settings can be done using the Internet Options.
Right click on the tab and select Show tabs on a separate row from the list of available menus.
Now the tabs would start appearing below the address bar as shown below and address bar will start displaying the fill website URL.