[news.eclipse.platform.rcp] Intro comes up blank

[MichaelMSchmidt@xxxxxxx (Michael Schmidt)]

I have an RCP application that I developed with Eclipse 3.1 on Windows XP. 
I've now moved to Eclipse 3.4.0 on Linux (Ubuntu 7.1).  In updating the 
application, I ran into a problem.  The previously-working intro part 
(Welcome screen) comes up but it is blank.  I spent all day reading the 
various tutorials on the web and searched this group before posting.  I 
also created a test application using the "RCP application with an intro" 
template and, when I ran it, it also had a blank Welcome screen.  Here is 
the relevant code from my plugin.xml file:

<code>
   <!-- define the intro/welcome screen part -->
  <extension
        point="org.eclipse.ui.intro">
     <intro
           class="org.eclipse.ui.intro.config.CustomizableIntroPart"
           icon="icons/intro.gif"
           id="us.mschmidt.komo.introID">
     </intro>
     <introProductBinding
           introId="us.mschmidt.komo.introID"
           productId="us.mschmidt.komo.product">
     </introProductBinding>
  </extension>
  
	<!-- Add intro/welcome pages -->
  <extension 
 		point="org.eclipse.ui.intro.config">
     <config
           introId="us.mschmidt.komo.introID"
           id="us.mschmidt.komo.configID"
           content="intro.xml">
        <presentation
              home-page-id="root">
           <implementation
           	os="win32,linux,macosx"
               kind="html">
           </implementation>
        </presentation>
     </config>
  </extension>

<code>

The intro.xml file is pretty simple:  

<code>
<?xml version="1.0" encoding="utf-8" ?>

<!-- This is the introduction system contents file -->
<introContent>
   <page id="root" content="introdoc/root.xhtml"/>
   <page id="concept1" content="introdoc/concept1.xhtml"/>
   <page id="concept2" content="introdoc/concept2.xhtml"/>
</introContent>

<code>

The actual pages are xhtml.  I'm at a loss!  Any thoughts?
Thanks!