rem: dataObject.checked = wsm.contentArea.document.getElementById( aElementID ).checked; 
add: var checked = wsm.contentArea.document.getElementById( aElementID ).checked; dataObject.checked = element.getAttribute("reversed") == "true" ? !checked : checked; 
context:     get_Checkbox:      function ( aElementID )        {          var element = wsm.contentArea.document.getElementById( aElementID );          var dataObject = wsm.generic_Get( element );          if( dataObject )            {              dataObject.checked = wsm.contentArea.document.getElementById( aElementID ).checked;              return dataObject;            }          return null;        },
meta: 8395	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/8395/b58a221f2fde203195889c6df948140558b290e2/nsWidgetStateManager.js/buggy/xpfe/global/resources/content/nsWidgetStateManager.js