Hi Grog :

so you actually dragged your finger (from the middle of the screen) towards the bottom and released (with enough pressure to generate events?)

And it didn';t work?

The scrollbar is not a scrollbar (as it barely has width for that) it's just a scrolling indicator.

I can say one thing: if scrolling was a bug, nobody would be able to use it because it's the basic interaction in the software : probably you have:

a. something blocking the events to get to canola
b. problematic screen (did you calibrated it)
c. been trying to use hardware (it doesn't work by now) it will work in the future thought.

If you have a 770 you may need to put MORE pressure, because the screen is not sensitive enough

Marcelo