Then I’ve no idea. Maybe google helps you to find more informations about using a Standard USB MIDI device on a PowerPC based Mac.
Best Regards, Thorsten.
P.S.: it could be important that your core module is powered from an external PSU, or from a USB hub with a “strong” PSU supply.
Thanks a lot. I’ve googled a little and didn’t found much, I will post here if I find a solution.
The Core is powered from it’s own external PSU. The USB MIDI has been working on a Windows PC since day 1. I’ve uploaded the .hex files from there through USB. I never got MIOS Studio to work under Panther, so it’s been good to update to Tiger, because now it works great… at least with “normal” MIDI through the FastLane. 
Anyway I just wanted to know if there was some step I may have missed, I don’t wanna turn this topic into “troubleshooting my USB”, so…
…back to the suggestions:
Multi Triggers have been replaced by the Roll function which can be assigned to an individual layer.
Advantage: now multi triggers also change their velocity.
Another advantage: higher granularity for Length parameter (1..96 ticks)
As the beyond-the-glide mode is still in the V4 Manual I thought it was still working.
I didn’t knew that Length had some effect in Roll. I have been trying. In V3 you could define the ticks in between repeats quite nicely. For what I undestand, now you do it with the Length, but it only seems to work when 4 or 5 Repeats in Roll are selected. When 2 or 3 it always does the same. How can you do it in Drum Tracks when no Length Layer is there?
And… some more thoughts:
-In a Note Parameter Layer, and maybe also in a Chord Layer, activating “FAST” could switch the encoders to octave jumps. I’d find that really useful. What do you people think?
-In Drum Mode Trigger Layers. Maybe removing a Gate could also remove the ACCent. And inserting an ACCent could also insert a Gate.
-Wouldn’t it be nice to apply Grooves to the DIN SYNC clock output? 
Thanks again!