<IfModule mod_deflate.c>
  <IfModule mod_filter.c>
     # these are known to be safe with MSIE 6
     AddOutputFilterByType DEFLATE text/html text/plain text/xml

     # everything else may cause problems with MSIE 6
     AddOutputFilterByType DEFLATE text/css
     AddOutputFilterByType DEFLATE application/x-javascript application/javascript application/ecmascript
     AddOutputFilterByType DEFLATE application/rss+xml
     AddOutputFilterByType DEFLATE application/xml
     AddOutputFilterByType DEFLATE application/xhtml+xml
     AddOutputFilterByType DEFLATE image/svg+xml
     AddOutputFilterByType DEFLATE application/atom_xml
     AddOutputFilterByType DEFLATE application/x-httpd-php
     AddOutputFilterByType DEFLATE application/x-httpd-fastphp
     AddOutputFilterByType DEFLATE application/x-httpd-eruby
  </IfModule>
</IfModule>