Index: branches/5.1.x/core/admin_templates/js/forms.js
===================================================================
diff -u -N -r12657 -r13141
--- branches/5.1.x/core/admin_templates/js/forms.js	(.../forms.js)	(revision 12657)
+++ branches/5.1.x/core/admin_templates/js/forms.js	(.../forms.js)	(revision 13141)
@@ -64,7 +64,13 @@
 
 	for (var i = 0; i < iframes.length; i++) {
 		if (iframes[i].id.match(/___Frame$/) && iframes[i].getAttribute('latesrc')) {
-			iframes[i].contentWindow.location = iframes[i].getAttribute('latesrc');
+			var $iframe = iframes[i];
+
+			setTimeout(
+				function () {
+					LoadFCKEditor($iframe);
+				}, 0
+			);
 		}
 	}
 
@@ -74,6 +80,10 @@
 	}
 }
 
+function LoadFCKEditor($iframe) {
+	$iframe.contentWindow.location = $iframe.getAttribute('latesrc');
+}
+
 function Form() {}
 
 Form = new Form();