Drag move is buggy when Windows DPI is set to 144 (150%)

[Tim Singer]

Environment:
  Windows 7 x64
  64-bit version of InkScape 0.91 installed
  Screen resolution: 2880x1620
  System DPI setting: 144 (150%)

When dragging any of several item types on the canvas (objects, groups, nodes, etc.), the item jumps between two locations while dragging - one at the mouse cursor and one several hundred pixels to the right and down from the mouse cursor. As a result:
 * It is more difficult to place the object/node/etc. exactly where I want it
 * It triggers the automatic scrolling while dragging even when my mouse cursor is close to the center of the screen, sometimes instantly scrolling significantly away from the page, at which point I have to abandon the drag move, recenter the scroll bars and try again.

This issue does not occur when I set my system DPI to 96 (100%).

[Tim Singer (f-tim-m)]

Could be related to snapping behavior - I've got a rather fine grid with spacing=1.0 px and snapping enabled.