Final Edit - That fixed it. EDIT AGAIN - sorry should have done a search - just now investigating setting up the permissions correctly. EDIT: I'm also getting exactly the same error with a wordpress site I've just uploaded.
Server error! The server encountered an internal error and was unable to complete your request. Error message: Premature end of script headers: index.php If you think this is a server error, please contact the webmaster. Error 500 ccgi.collinet.plus.com Fri Oct 1 19:32:37 2010 Apache