title: Selenium webdriver using switch_to_windows() and printing the title doesn't print the title.
body: <p>Here is the code </p>
  
  <pre><code>for handle in browser.window_handles:
      print "Handle = ",handle
      browser.switch_to_window(handle);
      elem = browser.find_element_by_tag_name("title")
      print elem.get_attribute("value")
  </code></pre>
  
  <p>I am getting the following output</p>
  
  <pre><code>Handle =  {564f8459-dd20-45b8-84bf-97c69f369738}
  None
  Handle =  {85338322-5e58-4445-8fe3-3e822d5a0caf}
  None
  </code></pre>
  
  <p>After getting the handle I switch to the window and print the title. Why am I not seeing any title. Won't there be any titles? When I see the html source for the page I see the title tag though. </p>