I'm using Xubuntu 14.04 and I noticed a strange behaviour when sliding the scrollbars in GTK+ applications, like evince.
When holding the scrollbar and moving not too much it changes into a so-called "zoom mode", translating mouse movements 1 to 1 to screen scrolling (and not proportional to the scroll bar length as in any other linux desktop application).

This "feature" is described in this blog:
https://blogs.gnome.org/mclasen/2013/08/05/scrolling-in-gtk/

This behaviour is very annoying because counter-intuitive (at least for standard non-touch displays).
For example, while reading a document I might first click (and hold) and later scroll or first scroll only slightly and then faster.

Anyway, I find myself very often in this scrollbar "zoom mode" without wanting it.

Could you please disable this behaviour.
Or at the very least make it configurable! (and disable by default)

Thanks in advance.