Sporadic "Document Contains No Data" pages

On a RedHat 7.2 machine I've installed: Apache v1.3.22 (with mm 1.1.3 and mod_ssl 2.8.5-1.3.22 and openssl 0.9.6b) PostGreSQL v7.1.3 PHP v4.1.0 a dummy file with <?php echo phpinfo(); ?> displays the information page However when trying to view the main page of my site, my users and I receive the "Document Contains No Data" error on seeminly random occasions. Some never receive it if they follow a link to the page, others almost always if the follow the link. Similar behavoir for those who enter it directly in the address bar. Typically one method works for a given user, but it seems to be browser independent. I didn't mess with the apache conf file, except to add index.php the mod_dir.c list of director indexes. Any advice would be greatly appreciated. Eric Nielsen