I have my own server, and I have total control of it. It is Fedora Core 4, Apache 2.0.54 and PHP 5.0.5. I am using the ISPConfig control panel (http://www.ispconfig.org) to create users and web sites.I currently have two sites running on the server. One is a Drupal 4.6 site, the other is a test site (a copy of the first site, upgraded to 4.7). Both of these seem to be working fine.I started creating a new web site with Drupal 4.7.3, and immediately started getting 500 Internal Server Error. I've looked through several threads that implicate the .htaccess file, so I commented out the whole file, then uncommented each section one by one. Everything seems to work OK if I leave the following lines commented:# Set some options.##Options -Indexes##Options +FollowSymLinks# Set the default handler.##DirectoryIndex index.php# PHP 5, Apache 1 and 2##<IfModule mod_php5.c>## php_value magic_quotes_gpc 0## php_value register_globals 0## php_value session.auto_start 0##</IfModule># Reduce the time dynamically generated pages are cache-able.##<IfModule mod_expires.c>## ExpiresByType text/html A1##</IfModule>The maddening thing is that the other two sites work fine, even though I have not had to comment out anything in their .htaccess files.read more