Changes to dw-style.xsl

COMMENT OUT

<!--
<a border="0">
<xsl:attribute name="href">
<xsl:value-of select="concat($fn, '.zip')"/>
</xsl:attribute>
<img src="../{$images-directory}/i/icon-zip.gif" border="0" alt="ZIP"/>
</a>
-->

If this file is not changed the non-functional zip image-link will be present.
Alternatively, the zip file could be created with another utility and the zip image-link could be used after either naming the zip file the same name as the tutorial's filename attribute value, or by changing the xsl:value-of select's value to the files name.