Guenter (et al) - I tried all recent pd's for MIDI on my RedHat5.1/OSS system: 23-4 seg faults on MIDI out, only 23-4 BUT it seems I lost all MIDI function back at pd 23-1 !
When I diff the x_midi.c, what I see is that 22 -> 23 involved a move from treating MIDI data as ints to treating them as floats. Perhaps somehow this lies at the root of the in-effective midi objects on my system. I will try to look into it more this weekend.
CharlieB