Ok..update...I decided to see if the Video Driver was the culprit
so I rolled back to the Win 8 driver, which was fine...NOPE...
problem with jumpy faders persists...so may be something
to do with Windows graphics handling/Touch..blah blah blah..
don't know...but, hopefully Win 8.1 drivers are available soon,
and/or X3c solves the issues...
More to come....