OK, so I uninstalled, then re-installed everything! Problem is still there. TRY THIS:
make a new song in BIAB, set the drums to fusionobrosterryclarke. Put lots of shots in the chords... like this:

^C... ^F... ^A... ^G... etc. The chords don't really matter.

Anyways, pan the bass to 64, then drums to -63 and mute all the other channels. Play the tune and only play back the bass channel. I do this on my mac by going into system prefs, sounds, then putting the slider all the way to the right.

Doing this, I only get BASS coming through my right speaker (which is what I want).... unfortunately, I also get all the explosive hits from the drums too. RESULT: Bass and ONLY the explosive drum hits in the right speaker.

ALSO, NEW WEIRD THING... If I pan the bass all the way to 64 it actually mutes it! If I put it at 63, it comes back. I think I've got a real bug here in the software.

The bummer is that, I 've been separating the bass and drums left and right, then feeding it through a mixer, so I can control the volume levels of each when I'm gigging with my piano player (I play sax). The other night, on the gig, it starts doing this and I didn't know what to do, so I turned the drums way down and the bass way up, and oh man it was a nightmare on the gig!
Blerg.

~Benny
www.bennytorres.com