I am using WordPress version 2.6.3.
Here is my process...
Publish a new post, fine.
From that screen, hit edit post and then save, fine.
Click, manage, select that same post (or any for that matter), make changes, then hit save - problem.
It redirects to my 404 not found page.
When I hit manage my web address is the following:
http://www.domain.net/wp-admin/post.php?action=edit&post=209
After making the changes and hitting save, the page address that is showing the 404 error is the following:
http://www.domain.net/wp-admin/post.php?action=edit&post=209&message=1&_wp_original_http_referer=http%3A%2F%2Fwww.domain.net%2Fwp-admin%2Fedit.php
Any ideas as to why this could be happening? (It happens when editing Pages as well) (Both in Safari and FF on a mac)