diff --git a/bricks/header.tmpl b/bricks/header.tmpl
index 0acbdb8..b923d6f 100644
--- a/bricks/header.tmpl
+++ b/bricks/header.tmpl
@@ -5,7 +5,7 @@
     <meta http-equiv="X-UA-Compatible" content="IE=edge" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
 <link rel="stylesheet" href="{{entire_url('/bricks/3parties/xterm.css')}}" />
-<link rel="stylesheet" href="{{entire_url('/bricks/css/bricks.css')}}?v=20260815b">
+<link rel="stylesheet" href="{{entire_url('/bricks/css/bricks.css')}}?v=20260815c">
 <link rel="stylesheet" href="{{entire_url('/bricks/css/api_doc.css')}}">
 {% for mycss in cssfiles() %}
 <link rel="stylesheet" href="{{entire_url(mycss)}}">
@@ -37,7 +37,7 @@
   <script type="module"
     src="{{entire_url('/bricks/3parties/model-viewer.min.js')}}">
   </script>
-  <script src="{{entire_url('/bricks/bricks.js')}}?v=20260815b"></script>
+  <script src="{{entire_url('/bricks/bricks.js')}}?v=20260815c"></script>
 {% for myjs in jsfiles() %}
   <script src="{{entire_url(myjs)}}"></script>
 {% endfor %}
diff --git a/bricks/tree.js b/bricks/tree.js
index 7e165ca..ae5eb50 100644
--- a/bricks/tree.js
+++ b/bricks/tree.js
@@ -102,6 +102,7 @@ bricks.TreeNode = class extends bricks.VBox {
 		});
 	}
 	change_node_type(){
+		console.log('CTN id=', this.user_data && this.user_data.id, 'is_leaf=', this.is_leaf, 'raw=', this.user_data && this.user_data.is_leaf, 'field=', this.is_leaf_field);
 		if (this.is_leaf){
 			this.triple.set_url(null);
 		} else {