remove bottom and right line in reflection

The creation of an image reflection causes a 1px line on the bottom or right of an image; but NOT the top or left.

For example: http://mkfilms.org/images/unwanted_line.jpg

Possible clue:

There appear to be some misplaced relationships among height and width, like these on lines 160-161:

    case 'right':
      $steps = min($options['size'], $image->info['height']);

Notes:

This is related to http://drupal.org/node/374100, but with version 6.x-1.1.
I also tried the patch from the above node, but it did NOT work for me.
The patch from http://drupal.org/node/413198#comment-2050132 was necessary.