I know this is an old thread but I just found it and I am glad I am not alone.
I am alone on a few things however...
1. I only use my machine in stand alone live applications.
2. My ghost note sounds like an INIT patch sound at a 32nd note... real quick, barely noticeable in live format.
3. After the ghost note occurs my octave drops -12 and if the ghost note happens to do it again it will correct itself +12
I have mastered the quick octave change during a song... but Access couldn't really help. Perhaps the ghost in the machine is real after all... or maybe there is a real issue here that needs some R and D!
I don't know if anyone is still having these problems after 5.0.8 but I have a comp on order to meet the specs of Windows 64 bit and maybe the new OS and firmware will help.
Thanks for the thread to know that it is not just something I did to my machine.