[ #316278 ] IE9: File upload locks

build.xml

@@ -655,6 +655,7 @@
             <!-- YUI file we changed -->
             <include name="yui/button/button.js"/>
             <include name="yui/container/container.js"/>
+            <include name="yui/connection/connection.js"/>
             <include name="yui/treeview/treeview.js"/>
             <include name="yui/examples/treeview/assets/js/TaskNode.js"/>
             <include name="yui/examples/treeview/assets/js/CheckOnClickNode.js"/>

src/resources-packaged/ops/yui/connection/connection.js

@@ -1086,8 +1086,10 @@ YAHOO.util.Connect =
   * @for Connect
   */
 (function(){
+    // Orbeon change. See http://wiki.orbeon.com/forms/developer-documentation/yahoo-ui-library-yui
 	var YCM = YAHOO.util.Connect,
-		YE = YAHOO.util.Event;
+		YE = YAHOO.util.Event,
+        dM = document.documentMode ? document.documentMode : false;
    /**
 	* @description Property modified by setForm() to determine if the data
 	* should be submitted as an HTML form.
@@ -1334,9 +1336,12 @@ YAHOO.util.Connect =
 		// IE does not allow the setting of id and name attributes as object
 		// properties via createElement().  A different iframe creation
 		// pattern is required for IE.
+        // Orbeon change. See http://wiki.orbeon.com/forms/developer-documentation/yahoo-ui-library-yui
 		var frameId = 'yuiIO' + this._transaction_id,
+			ie9 = (dM === 9) ? true : false,
 			io;
-		if(YAHOO.env.ua.ie){
+
+		if(YAHOO.env.ua.ie && !ie9){
 			io = document.createElement('<iframe id="' + frameId + '" name="' + frameId + '" />');
 
 			// IE will throw a security exception in an SSL environment if the