title: jQuery No longer accepting attr("Checked") === true Logic
body: <p>I've noticed that after a upgrade to the latest version of jquery (1.7.1) that the following code no longer evalulates</p>
  
  <pre><code>if( $('#item').attr('checked') === true ){
      //do something
  }
  </code></pre>
  
  <p>I sort of understand why they may have made this change but does anyone have a link to documentation of why they have done this? I want to ensure my code works correctly.. and it seems that maybe I have been incorrectly using the above for quite a while.</p>