Hello, first of all sorry for bad English. It's my second submit here, sorry if something isn't right.

Old style does not working

'validators' => array( array('Size', false, array(1, 1048576)) )

--

This style works 'validators' => array( array('Size', false, array('min' => '3', 'max' => '9')) )

--

But:

1. When file is zero size error message looks like this "Minimum expected size for file '0b.txt' is '0' but '0' detected"
2. When file size more than max allowed we got throw error 0 string(1311) "The maximum must be greater than or equal to the minimum filesize, but 0 < 3
   exception 'Zend_Validate_Exception' with message 'The maximum must be greater than or equal to the minimum filesize, but 0 < 3' in /var/www/!project/library/Zend/Validate/File/Size.php:235 Stack trace: #0 /var/www/!project/library/Zend/Validate/File/Size.php(303): Zend_Validate_File_Size->setMax('9B') #1 /var/www/!project/library/Zend/File/Transfer/Adapter/Abstract.php(589): Zend_Validate_File_Size->isValid('/tmp/phpwPiifq', Array) #2 /var/www/!project/library/Zend/Form/Element/File.php(435): Zend_File_Transfer_Adapter_Abstract->isValid('file') #3 /var/www/!project/library/Zend/Form.php(1987): Zend_Form_Element_File->isValid(Array, Array) #4 /var/www/!project/modules/default/controllers/FilesController.php(1058): Zend_Form->isValid(Array) #5 /var/www/!project/library/Zend/Controller/Action.php(503): FilesController->uploadAction() #6 /var/www/!project/library/Zend/Controller/Dispatcher/Standard.php(285): Zend_Controller_Action->dispatch('uploadAction') #7 /var/www/!project/library/Zend/Controller/Front.php(934): Zend_Controller_Dispatcher_Standard->dispatch(Object(Zend_Controller_Request_Http), Object(Zend_Controller_Response_Http)) #8 /var/www/!project/index.php(91): Zend_Controller_Front->dispatch() #9 {main}"

--

This validator works good with all aviable variants 'validators' => array( array('Size', false, array('min' => '3KB', 'max' => '9KB')) )

--

I think one of the problem is error in size naming convention look here

protected function _toByteString($size) { $sizes = array('B', 'kB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB'); for ($i=0; $size >= 1024 && $i < 9; $i++) { $size /= 1024; } return round($size, 2) . $sizes[$i]; }

--

And here

protected function _fromByteString($size) { if (is_numeric($size)) { return (integer) $size; }

$type  = trim(substr($size, -2));
$value = substr($size, 0, -2);
switch (strtoupper($type)) {
    case 'YB':
        $value *= (1024 * 1024 * 1024 * 1024 * 1024 * 1024 * 1024 * 1024);
        break;
    case 'ZB':
        $value *= (1024 * 1024 * 1024 * 1024 * 1024 * 1024 * 1024);
        break;
    case 'EB':
        $value *= (1024 * 1024 * 1024 * 1024 * 1024 * 1024);
        break;
    case 'PB':
        $value *= (1024 * 1024 * 1024 * 1024 * 1024);
        break;
    case 'TB':
        $value *= (1024 * 1024 * 1024 * 1024);
        break;
    case 'GB':
        $value *= (1024 * 1024 * 1024);
        break;
    case 'MB':
        $value *= (1024 * 1024);
        break;
    case 'KB':
        $value *= 1024;
        break;
    default:
        break;
}

return $value;

}

--

Byte ('B') is one character $value = substr($size, 0, -2);