I upgraded my shop from 1.3. 8 to 1.3.9f. I uploaded the whole new set over the existing one and ran the upgrade. Everything worked perfect.
Now if I want to alter a setting in my admin panel, I can't apply any changes. When I hit the send button, no changes are made and I am redirected to the admin index page.
I change my admin folders name, but I also changed the name of the uploaded new admin folder.
I can add a comment to an order, but I think there is a problem to update anything that is in the configuration table.