Just had a look into the url of another working wordpress install: The problem seems to be coming from the _wp_original_http_referer, see the way on the install that works: it has ..3A and the broken install, it has ..2F
/wp-admin/page.php?action=edit&post=248&message=1&_wp_original_http_referer=
http%2F%2Fwww.flights-from-birmingham.com
%2Fwp-admin%2Fedit-pages.php
[WORKS]
———————-
/wp-admin/page.php?action=edit&post=248&message=1&_wp_original_http_referer=
http%3A%2F%2Fwww.flights-from-birmingham.com
%2Fwp-admin%2Fedit-pages.php
[DOES NOT WORK]
Check the two url’s on the main Settings page. Are they missing the colon, perhaps?
Thanks for the reply Otto.
Unfortunately they are both correct and have the colon. Is there anyway to even hack it, so it redirects to the working url (I know, not the best solution)?