Index: /trunk/doc/manual/en_US/user_AdvancedTopics.xml
===================================================================
--- /trunk/doc/manual/en_US/user_AdvancedTopics.xml	(revision 50581)
+++ /trunk/doc/manual/en_US/user_AdvancedTopics.xml	(revision 50582)
@@ -2640,7 +2640,7 @@
           that host key action.</para>
         <table>
-          <title>ignoreme</title>
+          <title>Host Key customization</title>
           <tgroup cols="3">
-            <tbody>
+            <thead>
               <row>
                 <entry><emphasis role="bold">Action</emphasis></entry>
@@ -2648,4 +2648,6 @@
                 <entry><emphasis role="bold">Action</emphasis></entry>
               </row>
+            </thead>
+            <tbody>
               <row>
                 <entry><computeroutput>TakeSnapshot</computeroutput></entry>
@@ -2843,7 +2845,7 @@
       <computeroutput>VBOXWEB_PORT</computeroutput> etc.):
       <table>
-        <title>ignored</title>
+        <title>Web service configuration parameters</title>
         <tgroup cols="3">
-          <tbody>
+          <thead>
             <row>
               <entry><emphasis role="bold">Parameter</emphasis></entry>
@@ -2851,4 +2853,6 @@
               <entry><emphasis role="bold">Default</emphasis></entry>
             </row>
+          </thead>
+          <tbody>
             <row>
               <entry><computeroutput>USER</computeroutput></entry>
@@ -3139,5 +3143,5 @@
       can still be used):
       <table>
-        <title>ignored</title>
+        <title>VirtualBox watchdog configuration parameters</title>
         <tgroup cols="3">
           <tbody>
Index: /trunk/doc/manual/en_US/user_Technical.xml
===================================================================
--- /trunk/doc/manual/en_US/user_Technical.xml	(revision 50581)
+++ /trunk/doc/manual/en_US/user_Technical.xml	(revision 50582)
@@ -189,11 +189,14 @@
       <title>Summary of 4.0 configuration changes</title>
 
+      <para>The following table gives a brief overview of the configuration
+      changes between older versions and version 4.0 or above:</para>
+
       <table>
-        <title>ignoreme</title>
+        <title>Configuration changes in version 4.0 or above</title>
 
         <tgroup cols="3">
-          <tbody>
+          <thead>
             <row>
-              <entry></entry>
+              <entry><emphasis role="bold">Setting</emphasis></entry>
 
               <entry><emphasis role="bold">Before 4.0</emphasis></entry>
@@ -201,5 +204,6 @@
               <entry><emphasis role="bold">4.0 or above</emphasis></entry>
             </row>
-
+          </thead>
+          <tbody>
             <row>
               <entry>Default machines folder</entry>