Index: imagemagick.module
===================================================================
RCS file: /cvs/drupal-contrib/contributions/modules/imagemagick/imagemagick.module,v
retrieving revision 1.8
diff -u -p -r1.8 imagemagick.module
--- imagemagick.module	30 Jan 2011 19:37:44 -0000	1.8
+++ imagemagick.module	30 Jan 2011 20:34:59 -0000
@@ -210,7 +210,9 @@ function image_imagemagick_rotate(stdCla
  * @see image_crop()
  */
 function image_imagemagick_crop(stdClass $image, $x, $y, $width, $height) {
-  $image->ops[] = '-crop ' . (int) $width . 'x' . (int) $height . '+' . (int) $x . '+' . (int) $y . '!';
+  $x_signed = ((int) $x < 0 ? '-' : '+') . $x;
+  $y_signed = ((int) $y < 0 ? '-' : '+') . $y;
+  $image->ops[] = '-crop ' . (int) $width . 'x' . (int) $height . $x_signed . $y_signed . '!';
   $image->info['width'] = $width;
   $image->info['height'] = $height;
   return TRUE;