I'm working on a site http://www.greytribe.com.au/creative and running WP3.01 with Europa theme. I've encountered an error adding or editing a "Works" item. I completed the all the info, images etc, and when I hit Publish or Update, I'm getting the following 406 error message:
An appropriate representation of the requested resource /creative/wp-admin/ could not be found on this server.
Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.
I'm locked out of my backend, if I try to log in I get the same message.