Hey!
I put in Midjay, the 4.2i version.It's a little bit better, in five hours of palying, I got 2 IIC interrupt messages.I'm not figured yet what make this but I'll check all my midis again and again.It should be something like, when the midi stop the OS is re-reading all the root and folders?..maybe.
But still the same problem with Midi hangs comunication via USB in OS 4.2i.
Thanks..