I'm trying to use a visualforce page to display content in my customer portal header to take advantage of translations and custom labels.  When I view the end result, all I see is the custom header and no tabs or portal content.  I'm doing the following:

1. Create a VF page with the logos and content I want to see in the portal header.  Give all profiles access to this page.
2. Create a basic htm file with an iframe tag pointing to the above VF page.  Uploaded into Documents
3. Update the portal to point to this document in the Header file.

When I log into the portal, I can see the wonderful custom header with translations etc, but nothing else - no portal tabs or content whatsoever.  Anyone else able to display VF in the header?

VF Page code:

<apex:page showHeader="false" sidebar="false">
    <table width="100%"><tr>
        <td align="left">
            <apex:outputPanel rendered="{!$CurrentPage.parameters.logoId != ''}">
                <a href="/home/home.jsp" target="_top">
                <img src="https://na1.content.force.com/servlet/servlet.ImageServer?id={!$currentpage.parameters.logoId}&oid=00D300000006e0w" /></a>
            </apex:outputPanel>
            <img src="/s.gif" alt="" width="1" height="1" class="spacer" title=""/>
        </td>
        <td align="right">
            <div class="linkElements">
            <a href="/apex/Frequently_Asked_Questions?sfdc.tabName=01r30000000Z14v"  target="_top">{!$Label.Get_Help}</a>&nbsp;&nbsp;
            <a href="/apex/ResetPortalPwd"  target="_top">{!$Label.Change_Password}</a>&nbsp;&nbsp;
            <a href="/secur/logout.jsp"  target="_top">{!$Label.Logout}</a>&nbsp;
             
        </div></td>
    </tr></table>
</apex:page>

HTM File content:

<iframe width="100%" height="80px" src="/apex/PortalHeader?logoId=01530000000wGQe" frameBorder="0"/>