Twist touch screen is jumpy

I just got a demo Twist (3347-6LU) to test out and after installing the software for the Lenovo USB 3.0 dock, when I touch the screen to scroll through a webpage or move a window, it gets really jumpy/jittery if I hold my finger still.
No new updates available through System Update so I'm not sure where to go with this. I've tried two different driver installs for the dock that I found through some digging on the Lenovo support site.

I am having this problem too.  There are numerous other threads about the touchscreen stopping working, but even with hours of reading the threads I've yet to see a definitive answer or fix.
I thought it started after installing Office 2010, as others had reported that happening, so I refreshed the machine, which didn't work, then completely reinstalled windows from a recovery drive I made when I first got the machine (4 days ago).  It wasn't any better until after updating about 8 drivers through the Lenovo Solution Center.  I then plugged in the USB hub that has the external CD/DVD player to load Ofice 2007 to see if that would work.  Immediate failure of the touchscreen.  Unplugged the hub, touchscreen returned but erractic.  Now I can plug individual components into the usb port (at least the one on the right), but the screen control is still eratic.
And the screen occasionally dims a little (plugged in) for 5-10 seconds then goes back to normal brightness, but that's another frustrating thing, and actually another Win8 touchscreen machine (Samsung ATIV 700T) does that sometimes, too - Windows issue?
So, did you get any good response to your question?
Thanks

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    Mark Hopkins
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    twitter @lenovoforums
    English Community   Deutsche Community   Comunidad en Español   Русскоязычное Сообщество
    Attachments:
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    Please click Accept as Solution if you feel my post solved your issue, it will help others find the solution.
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