diff --git a/common/locale/en-US/map.xml b/common/locale/en-US/map.xml
index 6a585195..d082024a 100644
--- a/common/locale/en-US/map.xml
+++ b/common/locale/en-US/map.xml
@@ -374,7 +374,7 @@
 </item>
 
 <item>
-    <tags><![CDATA[<Leader>]]></tags>
+    <tags><![CDATA['mapleader' <Leader>]]></tags>
     <strut/>
     <spec><![CDATA[<Leader>]]></spec>
     <description>
diff --git a/common/modules/dom.jsm b/common/modules/dom.jsm
index 847fa3b9..9276b30e 100644
--- a/common/modules/dom.jsm
+++ b/common/modules/dom.jsm
@@ -415,7 +415,7 @@ var DOM = Class("DOM", {
         return editor;
     },
 
-    get isEditable() !!this.editor || this.style.MozUserModify == "read-write",
+    get isEditable() !!this.editor || this[0] instanceof Ci.nsIDOMElement && this.style.MozUserModify == "read-write",
 
     get isInput() isinstance(this[0], [Ci.nsIDOMHTMLInputElement,
                                        Ci.nsIDOMHTMLTextAreaElement,