diff --git a/src/documentation/content/xdocs/components/resolver/tips.xml b/src/documentation/content/xdocs/components/resolver/tips.xml
index 0ac965d..6a88f04 100644
--- a/src/documentation/content/xdocs/components/resolver/tips.xml
+++ b/src/documentation/content/xdocs/components/resolver/tips.xml
@@ -102,23 +102,36 @@ allow-oasis-xml-catalog-pi=yes
 ]]></source>
     </section>
 
+    <section id="debug">
+      <title>Debug</title>
+      <p>
+        Raise the "verbosity" parameter.
+      </p>
+      <p>
+        Use 
+        "<link href="http://ngrep.sf.net/">ngrep</link>"
+        to ensure no network traffic ('ngrep dtd').
+      </p>
+    </section>
+
     <section id="resources">
       <title>Other helpful resources</title>
       <p>Apache Cocoon uses the entity resolver. See the doc
         <link href="http://cocoon.apache.org/2.1/userdocs/concepts/catalog.html">Entity resolution with catalogs</link>.
       </p>
       <p>Apache Forrest uses Cocoon and the entity resolver. See the doc
-        <link href="http://xml.apache.org/forrest/validation.html">XML Validation</link>.
+        <link href="http://forrest.apache.org/docs/validation.html">XML Validation</link> and tips for 
+        <link href="http://forrest.apache.org/docs/catalog.html">configuration</link> of xml editors.
       </p>
       <p>Apache
         <link href="http://ant.apache.org/">Ant</link>
         uses the entity resolver.
       </p>
-      <p>Apache Avalon 
-        <link href="http://avalon.apache.org/excalibur/">Excalibur</link>
+      <p>Apache 
+        <link href="http://excalibur.apache.org/">Excalibur</link>
         has the 
         <code>org.apache.excalibur.xml.DefaultEntityResolver</code>
-        which was developed in Cocoon then moved to Avalon so that it would
+        which was developed in Cocoon then moved to Excalibur so that it would
         be more widely available.
         This hooks the resolver into the xml framework. It is available in
         the excalibur-xmlutil package.