diff -ur xf86-input-evdev-2.0.99.2.orig/src/evdev.c xf86-input-evdev-2.0.99.2/src/evdev.c
--- xf86-input-evdev-2.0.99.2.orig/src/evdev.c	2008-10-31 22:54:22.000000000 +0000
+++ xf86-input-evdev-2.0.99.2/src/evdev.c	2008-10-31 22:55:35.000000000 +0000
@@ -388,9 +388,9 @@
         abs_x = pEvdev->abs_x;
         abs_y = pEvdev->abs_y;
         if (pEvdev->invert_x)
-            abs_x = pEvdev->max_x - abs_x;
+            abs_x = pEvdev->max_x - (abs_x - pEvdev->min_x);
         if (pEvdev->invert_y)
-            abs_y = pEvdev->max_y - abs_y;
+            abs_y = pEvdev->max_y - (abs_y - pEvdev->min_y);
 
 	xf86PostMotionEvent(pInfo->dev, TRUE, 0, 2, abs_x, abs_y);
     }