I updated the installation tonight to 2.2 and now get the following error msg when trying to edit and save a page post.
An appropriate representation of the requested resource /wp-admin/page.php could not be found on this server.
The file page.php is on the server in the location suggested by the error message. I have no idea how to correct this but need to be able to update this page ASAP. The same problem occurs when trying to post a completely new page.