diff --git a/nuxeo-platform-ui-web/src/main/resources/OSGI-INF/deployment-fragment.xml b/nuxeo-platform-ui-web/src/main/resources/OSGI-INF/deployment-fragment.xml
--- a/nuxeo-platform-ui-web/src/main/resources/OSGI-INF/deployment-fragment.xml
+++ b/nuxeo-platform-ui-web/src/main/resources/OSGI-INF/deployment-fragment.xml
@@ -235,10 +235,14 @@
     <context-param>
       <param-name>facelets.LIBRARIES</param-name>
       <param-value>
-        /WEB-INF/nxdirectory.taglib.xml; /WEB-INF/nxweb-html.taglib.xml;
-        /WEB-INF/nxweb-util.taglib.xml; /WEB-INF/nxweb-document.taglib.xml;
-        /WEB-INF/nxweb-ajax4jsf.taglib.xml; /WEB-INF/nxweb-pdf.taglib.xml;
-        /WEB-INF/nx-seam-excel.taglib.xml; /WEB-INF/nx-seam-rss.taglib.xml;
+        /WEB-INF/nxdirectory.taglib.xml;
+        /WEB-INF/nxweb-html.taglib.xml;
+        /WEB-INF/nxweb-util.taglib.xml;
+        /WEB-INF/nxweb-document.taglib.xml;
+        /WEB-INF/nxweb-ajax4jsf.taglib.xml;
+        /WEB-INF/nxweb-pdf.taglib.xml;
+        /WEB-INF/nx-seam-excel.taglib.xml;
+        /WEB-INF/nx-seam-rss.taglib.xml;
       </param-value>
     </context-param>
 
@@ -250,13 +254,18 @@
       <param-value>false</param-value>
     </context-param>
 
+    <context-param>
+      <param-name>com.sun.faces.developmentMode</param-name>
+      <param-value>true</param-value>
+    </context-param>
+
     <!-- When a page is requested, what interval in seconds should the compiler
       check for changes. If you don't want the compiler to check for changes
       once the page is compiled, then use a value of -1.
-      
+
       Setting a low refresh period helps during development to be able to edit
       pages in a running application but slows down page rendering.
-      
+
       Default: 2 seconds.
     -->
     <context-param>
@@ -700,8 +709,8 @@
   </extension>
 
   <install>
-    <!--  create a temp dir -->
-    <!--  be sure no directory with that name exists -->
+    <!-- create a temp dir -->
+    <!-- be sure no directory with that name exists -->
     <delete path="nxwebplatform.tmp" />
     <mkdir path="nxwebplatform.tmp" />