XML button not displaying

I'm not sure if I've posted this in the correct place or if I've selected the correct Project and Issue information. I'm very new to Drupal and PHP so please go easy on me!

The following pertains to Drupal 4.6.0 with article.module 4.6.0.

I was getting the following HTML code displayed as a link on the article listings page instead of the XML button:

 <img src="/misc/xml.png" alt="XML Feed" \>

This is the snippet of code from the article.module that causes the problem:

. theme('more_info', l("<img src=\"misc/xml.png\" alt=\"XML Feed\" \>", 'article/feed'))
The button displays correctly if you change the above line of code to:

. theme_xml_icon('article/feed')