ACP -> Users and groups -> Manage group positions
The "Legend settings" and "Teampage settings" boxes contain a submit button each. When changing any of the options in these panels and clicking on "Submit" there is no indication that anything was done. It could be that I'm used to seeing the confirmation page afterwards in 3.0, but it does give the impression that nothing happened. Perhaps some sort of fading notice above the panel that was updated would be OK?