I use joomla for a site of mine (political framing, in sig), and I recently installed a component that makes the URLs search-engine friendly. This worked fine, but now I cannot access my site when the www is inserted before the site title. Therefore, http://politicalframing.com works but http://www.politicalframing.com results in this error: Found The document has moved here. Additionally, a 500 Internal Server Error error was encountered while trying to use an ErrorDocument to handle the request. Any ideas of how I can fix this?
Try creating an A record named www to point to the correct IP address. DNS Stuff does not show an A record for www right now.
Or 301 www. to its non-www equivalent so you don't end up with two duplicate sites in the indexes. One line added to your htaccess should do the job.