1. Use TRUNK version;
2. DON'T use Opera browser for this;
3. Open Administration > Authentification page
4. Sometimes buttons change from radio buttons to buttons on first load, but if not, continue to step 5.
5. Change from Internal to HTTP, for example and wait for page refresh. While page loads buttons now become radio buttons and, when page is fully loaded, they change back to normal buttons.

I don't have a slow machineThis is very noticeable. Haven't seen this before on 2.2. So probably only trunk is affected. Works fine on Opera browser.

But on Opera there is a different issue. Disabled "Save" button is gray and not light blue. It's hard to distinguish when button is enabled and disabled. See attached images.