Defining upload image resolution results in call_user_func_array() error

The following error is thrown only when

A) Max resolution is set for a filefield
B) An image is actually uploaded that is larger than the max resolution

warning: call_user_func_array() [function.call-user-func-array]: First argument is expected to be a valid callback, 'file_validate_image_resolution_help' was given in D:\inetpub\vhosts\*siteurlhere*\httpdocs\sites\all\modules\filefield\filefield_widget.inc on line 236.

The code block this references is

  foreach ($element['#upload_validators'] as $callback => $arguments) {
    $help_func = $callback .'_help';
    $desc[] = call_user_func_array($help_func, $arguments);
  }

Note: The file still uploads and resizes correctly, just the error is thrown. I tested this on both 6.x-3.0-alpha3 release (error references line 233 in this case) and Aug 26 development snapshot 6.x-3.x (error references line 236 in this case).