diff --git a/navalplanner-webapp/src/main/java/org/navalplanner/web/materials/MaterialsController.java b/navalplanner-webapp/src/main/java/org/navalplanner/web/materials/MaterialsController.java
index 44e6d42c4..e1162d5bb 100644
--- a/navalplanner-webapp/src/main/java/org/navalplanner/web/materials/MaterialsController.java
+++ b/navalplanner-webapp/src/main/java/org/navalplanner/web/materials/MaterialsController.java
@@ -386,10 +386,10 @@ public class MaterialsController extends
     private void reloadCategoriesTree(Treeitem treeitem) {
         if (treeitem != null) {
             final MaterialCategory materialCategory = (MaterialCategory) treeitem.getValue();
-            Util.reloadBindings(categoriesTree);
+            categoriesTree.invalidate();
             locateAndSelectMaterialCategory(materialCategory);
         } else {
-            Util.reloadBindings(categoriesTree);
+            categoriesTree.invalidate();
         }
     }
 
diff --git a/navalplanner-webapp/src/main/webapp/materials/materials.zul b/navalplanner-webapp/src/main/webapp/materials/materials.zul
index afe266c00..097789d8b 100644
--- a/navalplanner-webapp/src/main/webapp/materials/materials.zul
+++ b/navalplanner-webapp/src/main/webapp/materials/materials.zul
@@ -38,7 +38,7 @@
         <vbox id="messagesContainer" />
 
             <groupbox closable="false">
-            <caption label="${i18n:_('Categories')}" />
+                    <caption label="${i18n:_('Categories')}" />
                     <hbox>
                         <textbox id="txtCategory" onOK="materialsController.addMaterialCategory()"
                             style="padding-bottom: 4px" />