Index: motion-3.1.14/track.c
===================================================================
--- motion-3.1.14.orig/track.c	2004-10-18 10:52:19.337173616 -0400
+++ motion-3.1.14/track.c	2004-10-18 10:52:37.018088710 -0400
@@ -371,7 +371,7 @@
 			return 0;
 
 		move_x_degrees = delta_x * 1000 / (imgs->width/2);
-		move_y_degrees = delta_y * 1000 / (imgs->height/2);
+		move_y_degrees = -delta_y * 1000 / (imgs->height/2);
 	} else {
 		move_x_degrees = cent->x * 100;
 		move_y_degrees = cent->y * 100;