My solution was to turn off most of these things in my .htaccess file. Here it goes:
# let Apache recognize the ".php" extension AddType application/x-httpd-php .php DefaultType application/x-httpd-php # make php use this very uncool default charset I had been using for years php_value default_charset iso-8859-1 # make php define old style global variables php_flag register_long_arrays On # stop Apache from spewing "Charset: utf-8" AddDefaultCharset Off # stop Apache from silently mangling urls CheckSpelling Off # stop Apache from denying perfectly legitimate requests SecFilterEngine Off