title: SWFUpload works in IE, but not in Firefox
body: <p>Using SWFUpload v2.2, Firefox 3, IE 8, Flash 10
  In my ASP.NET application all uploads are being processed by upload.aspx (I have the correct upload_url set in the settings object). In IE 8 the uploads hit the upload.aspx page and are processed, but in Firefox they do not. Any suggestions? </p>
  
  <p>Most of the code for the page that the user visits to upload a file is shown here (note: master pages are being used):</p>
  
  <pre><code>&lt;script type="text/javascript" src="../swfupload/swfupload.js"&gt;&lt;/script&gt;
  
  &lt;script type="text/javascript" src="../js/handlers.js"&gt;&lt;/script&gt;
  
  &lt;script type="text/javascript"&gt;
      var swfu;
      window.onload = function() {
          swfu = new SWFUpload({
              // Backend Settings
              upload_url: "../upload.aspx",
              post_params: {
                  "ASPSESSID": "&lt;%=Session.SessionID %&gt;"
              },
  
              // File Upload Settings
              file_size_limit: "10 MB",
              file_types: "*.*",
              file_types_description: "All Files",
              file_upload_limit: 1,
              file_queue_limit: 1,
              //assume_success_timeout: 60,
  
              // Event Handler Settings - these functions as defined in Handlers.js
              //  The handlers are not part of SWFUpload but are part of my website and control how
              //  my website reacts to the SWFUpload events.
              file_queue_error_handler: fileQueueError,
              file_dialog_complete_handler: fileDialogComplete,
              upload_progress_handler: uploadProgress,
              upload_error_handler: uploadError,
              upload_success_handler: uploadSuccess,
              upload_complete_handler: uploadComplete,
  
              // Button settings
              button_image_url: "../Images/XPButtonNoText_160x22.png",
              button_placeholder_id: "spanButtonPlaceholder",
              button_width: 160,
              button_height: 22,
              button_text: '&lt;span class="button"&gt;Upload File&lt;span class="buttonSmall"&gt;(10 MB Max)&lt;/span&gt;&lt;/span&gt;',
              button_text_style: '.button { font-family: Helvetica, Arial, sans-serif; font-size: 14pt; } .buttonSmall { font-size: 10pt; }',
              button_text_top_padding: 1,
              button_text_left_padding: 5,
  
              // Flash Settings
              flash_url: "../swfupload/swfupload.swf", // Relative to this file
  
              custom_settings: {
                  upload_target: "divFileProgressContainer"
              },
  
              // Debug Settings
              debug: false
          });
      }
  &lt;/script&gt;
  </code></pre>