diff -r 2e4f1bd21196 src/video/x11/SDL_x11messagebox.c
--- a/src/video/x11/SDL_x11messagebox.c	Thu Jan 09 13:56:21 2014 -0300
+++ b/src/video/x11/SDL_x11messagebox.c	Fri Jan 10 18:47:38 2014 +0200
@@ -560,7 +560,11 @@
         case MotionNotify:
             if ( has_focus ) {
                 /* Mouse moved... */
+                int previndex = data->mouse_over_index;
                 data->mouse_over_index = GetHitButtonIndex( data, e.xbutton.x, e.xbutton.y );
+                if (data->mouse_over_index == previndex) {
+                    draw = SDL_FALSE;
+                }
             }
             break;