I've been having a lot of problems with your Menus.
In my back up install of pball, i modified the files to flag2, enabling the hi-res flag.. it takes 15 seconds to load. I'm glad you ditched it all together in v3.1
But even without that, in my regular pball directory, I've been having lots of problems. When I hit escape it flickers the flag for a second, then does nothing. I have no in-game menu (just a flag flicker). Hitting the ~ console key on the main menu can not be redone, I just get a flag flicker and then it acts like it's loading.
I think I'm just going to have to reinstall b18 and your old menus.