Hi there !
The new drivers (November 2013) works a lot better, however, I still get a crash every few days (sometimes 2-3 in the same day).
Not only in Cubase, but also in windows, while playing movies on youtube. The crash report is in the yfwaudio.sys.
On the same machine, with Windows XP 32 bit, no crash what so ever, absolutely stable, no matter what I throw at them.
Please fix the nasty bug, it IS annoying.