I updated my 2.x wordpress today, not sure what it was running but it was quite old, to 2.21 today and now my dashboard says:
You don't have permission to access /wp-admin/index-extra.php on this server.
Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.
Apache/1.3.36 Server at http://www.thekatsplace.com Port 80
I've found a few people saying they had the same problems a few months ago, but no one said what the solution was really.
Thanks in advance, for any help!