OK
problem solved. I had the Xarcade set to a different mode, and the offending buttons were all programmed to be a "C".
Shoot me now.
But but but but but!! I got another bunch of bugs for you!
1. There seems to be a difference between 3.1.1 and 3.11b, in that all of the song titles now appear in upper case, and between quotes "LIKE THIS"
The artist appears fine, in normal case.
Is this a new setting I've missed?
2. I seem to have lost mouse control. It worked in 3.11b but not 3.1.1.
The cursor appears, but doesn't move.
Both of the above appear to be version related, since I'm using the same control.ini, jukebox.ini and jukebox.db file between the 2 versions.
I also found a "free credits" bug that I'll start a separate subject for...