title: Nested UpdatePanel Behavior
body: <p>I am using a Wizard control in an UpdatePanel.  Some of the Wizard Steps have UpdatePanels nested inside.  Both the outer and inner UpdatePanels have their own Trigger collection.  All of the events fire as intended.  </p>
  
  <p>However, the triggers for the outer UpdatePanel do not set off the UpdateProgress control.  The inner ones all do.  I'm stumped as to why I can't get the outer Triggers to show the ProgressTemplate.  It's for some ImageButtons that navigate the Wizard Steps.</p>
  
  <p>Outlined, the nesting is as follows:</p>
  
  <pre>
  UpdatePanel
     Triggers
     ContentTemplate
        UpdateProgress
        Wizard
           Step #n
           UpdatePanel
              Triggers
              ContentTemplate
                     .
                     .
              /ContentTemplate
           /UpdatePanel
           /Step
                  .
                  .
        /Wizard
     /ContentTemplate
  /UpdatePanel
  </pre>