UPS Shipping labels no longer display: wrong (CDN) path returned from file_create_url()

UPS Shipping labels no longer displayed: the path was wrong returned from patch in file_create_url()

In admin/settings/cdn/other, put File URL */sites/default/files/ups_labels* on the Blacklist. Cleared cached, resync'd with CloudFront. Still the path for the UPS labels was on the cdn, when they should not have been.

In the end had to resort to 2 ugly mods to avoid file_create_url():

1/ uc_ups.admin.inc:
function theme_uc_ups_label_image() {
+ global $base_url;
$args = func_get_args();
- $image_path = file_create_url(implode('/', $args));
+ $image_path = $base_url .'/'. file_directory_path() .'/'. implode('/', $args);

2/ uc_shipping.admin.inc:
function theme_uc_shipping_shipment_print($order, $shipment, $labels = TRUE) {
+ global $base_url;
...
if ($labels) {
foreach ($shipment->packages as $id => $package) {
if ($package->label_image && ($path = file_create_path($package->label_image)) && file_exists($path)) {
// TODO: Find a way to store these magic numbers specifically for UPS.
list($width, $height) = array(672, 392);
+ $url = $base_url . '/' . $path;
$output .= '
' . "\n";
- $output .= theme('image', file_create_url($package->label_image), '', '', array('width' => $width, 'height' => $height), FALSE) ."\n";
+ $output .= theme('image', $url, '', '', array('width' => $width, 'height' => $height), FALSE) ."\n";

I did not research the root cause of the problem in file_create_url(). Does anyone know ?