Today... is a good day! The new Audio 6/10 firmware introduces Core Audio support, not only making them iPad compatible, but finally fixing the USB 3.0 issue for Windows devices (well, for me at least). Appears to be stable!
Grab it here: http://co.native-instruments.com/ind...raktor_Audio_6
(Note: this is a firmware update, not a driver update, so you can't find it in service center)