Hi there,
I just sent an email to Access Support about this problem. 4.0.2.01 seems to be OK, but 4.0.5.01 is detuned sharp about half a semitone when I use it with Ableton Live 8.1.3 or 8.1.4. Seems the only fix is to go back to the old version as I've tried different USB cables/ports on my computer, initializing the Snow, re-installed 4.0.5.01 and had no success. All the parameters seem to work just fine it's just out of tune globally. I have checked in the config menu and the transpose/global tune is 0; unfortunately you can't tune the instrument globally in cents otherwise I could fix it that way...
Was going to perform with this over the weekend but now I'm stressed. Hopefully 4.0.2.01 doesn't have any drastic problems.