Comment 4 for bug 824221

confirmed on Windows XP, Inkscape rev 10509, screenshot attached.
this happens with the Layers dialog, or Fill and Stroke, or Inkscape Properties dialog if they are undocked and floating. Dragging these dialogs does not cause a problem, but keeping them stationary and scrolling the Inkscape window beneath them causes the problem. Forcing a screen refresh by drawing something will remove the false images. It looks as though a screen refresh is _not_ being triggered during a scroll.