title: Ajax toolkit not working properly in IE 10
body: <p>I have a website in which I have used Asp.net AjaxToolkit modal popup element.</p>
  
  <p>It worked fine on every browser, but recently I tested it on Internet Explorer 10 (on windows 7 platform), and discovered a problem.</p>
  
  <p>When I open a modal popup, the popup content is not loading and a message box is appearing with an error like this:   </p>
  
  <blockquote>
    <p>"Error: Sys.WebForms.PageRequestManagerServerErrorException: Input
    string was not in a correct format."</p>
  </blockquote>
  
  <p>Anyone heard about this error?</p>
  
  <p>What is going wrong, what kind of "Input string" I was prompted about?</p>
  
  <p>Write an answer please, if you know what the problem is.</p>