[Zope] ZServer header and Netscape borwser

Hi, I installed Zope 2.0.1 for Linux RH 5.2 with python 1.5.2. Everything works good, however when I visit the site with Netscape Communicator 4.61. I get to see the HTML source code instead of the page. I telneted to port 8080 and grabbed the output and the ZServer is sending Content-Type: plain/text instead of html/text. IE5 seems not to mind and displays the page correctly. Any pointers to what I am missing or where should I read further more, will be appretiated. Thanks in advance. Adonis