Default [Q] Problems getting MAME4Droid working with a Bluetooth keyboard.

I got myself a Merry Christmas to me present: a 2nd gen Nexus 7, wi-fi only, with 32GB RAM.

Works great, I've been playing with it a lot.

And more recently, I just got a keyboard & case for it, a MiniSuit keyboard and case. The Bluetooth keyboard that came with this seems to be working fine - it charged up, paired up, works in all my apps...

...except Mame4Droid 0.139u1.

When I try to map game buttons, and the coin & start buttons to keys on this keyboard, things don't work. I can't get the coin or start buttons to respond at all when I map them to keyboard keys.

MAME seems to think my keyboard is actually a game controller, and expects it to have Select and Start buttons.

Are there any tricks to getting MAME to play well with a basic Bluetooth keyboard?