title: Have to click twice to expand DropDownList in ASP.NET
body: <p>I have inherited an ASP.NET 2.0 project and one of the things I have noticed is that the user has to click a <code>dropdownlist</code> twice in order to expand it - why is this?</p>
  
  <p><strong>Sequence of Events</strong></p>
  
  <ol>
  <li>The first click with give the control focus and the second will expand it.</li>
  <li>The application uses Master/Content pages and is Ajax enabled.</li>
  </ol>
  
  <p>It looks like this doesn't happen in IE6, but does happen in IE7.</p>