On Jan 12, 2014, at 1:43 PM, Eli Zaretskii <eliz@gnu.org> wrote:

> ould this be NS version of bug #15913?  Could you (or someone with
> access to NS) please try a similar fix as was done in revisions 115130
> and 115281?

Done, but on dice.

Even as is, ns_update_window_end calls reset_mouse_highlight, which implies the fix that was done to Win.

I thought we might have to add mouse_face_defer, like so:

  /* If a row with mouse-face was overwritten, arrange for
     frame_up_to_date to redisplay the mouse highlight.  */
  if (hlinfo->mouse_face_defer || mouse_face_overwritten_p)
    {
 	...
	}

But that still doesn't fix it.

Unlike in the bug you cite, I don't see a flicker at all.

(I do see flicker when moving the mouse over highlighted buttons while a region is selected, but I haven't managed to determine all the necessary conditions for this.)