Being a newbie, I have difficulties getting Zope to display tables
the way I want to. I have the following defined as my
standard_html_header:

<html>
<head>
<title><dtml-var title_or_id></title>
</head>

<body leftmargin="0" topmargin="0" marginwidth="0" marginheight="0">

<table width=100% border=1 cellpadding=0 cellspacing=0>
   <tr>
<td colspan=2 bgcolor="#6666CC" height=25>          
   <img src="images/top_bar">
</td>
        <td>
        </td>
   </tr>
   <tr>
      <td valign="top" width=140><img src="images/logo" border=1
width=140 height=122></td>
      <td>
        There's some navigation here... 
      </td>
   </tr>
</table>

The problem is the width of the cell holding the "logo": when I view
a standard HTML document w/ the same code directly in a browser
(IE6), the cell has the appropriate width (namely 140, the same as
the image). However, when viewed through Zope (but also IE6), the
cell takes up half of the table width.
Can anybody give me a hint why this might be happening?

Thanks,
Philipp