I've had a very complicate bug in Audya and I wrote about it at this forum , that was random error in synchronization between midi and live drum and it was impossible to play normally on a live gig .Audya was purchased in february 2009 so I sold that and brought a new one.There is my colleague that purchased Audya also in february and had the same problem (also with OS 3.0). Now with new Audya I haven't that problem any more.So bug is not in software but in hardware and our dealer is going to factory to Italy to change the motherboard of that two KB that he sold.So I believe that there are some hardware problems, depends to different series ,that can not be fixed with software upgrade. This was my experience,so check it up.