I have an existing established site (indexed) in which I would like to change the permalink structure from /%postname%/ to /%postname.php
I've tested the change successfully but haven't been able to form a 301 redirect pattern. All indexed pages land on "Page not found".
I've tried Deans Permalink Migration plugin but it doesn't appear to work with WP 3.2 (options missing, no affect)
Any help appreciated