I am looking at 4.6 documentation at:
http://doc.qt.nokia.com/qt-maemo-4.6...cscroller.html

And the code is:

scroller = mywidget.property("kineticScroller").toPyObject()
if scroller:
scroller.setEnabled(True)
scroller.setAxisLockThreshold(1.0)

setEnabled fine, setAxisLockThreshold not found, axisLockThreshold not found.

Thanks,
+ Mikael