I am generating a thumbnail from a submitted image and i get a broken image, the colors there are inadequate.

Here's the code i use:

function ImageName () {

    if($_FILES['userfile']['type']!='image/gif' && $_FILES['userfile']['type']!='image/jpeg' && $_FILES['userfile']['type']!= 'image/pjpeg' || !isset($_SESSION['SESSION_UNAME'])){

	return '';
    } else {

	$time = time();

	switch($_FILES['userfile']['type']) {
	    case 'image/gif':
		$newname = './upload/' . $_FILES['userfile']['name'] . $time . ".gif";
		if(!copy($_FILES['userfile']['tmp_name'],$newname)) {
		    echo "Can't copy";
		}
		$newname = $_FILES['userfile']['name'] . $time . ".gif";
		break;
	    case 'image/jpeg':
		case 'image/pjpeg':
		$newname = './upload/' . $_FILES['userfile']['name'] . $time . ".jpg";		
		if(!copy($_FILES['userfile']['tmp_name'],$newname)) {
		    echo "Can't copy";
		}
		$im = @ImageCreateFromJPEG($newname);
		$im_X = ImageSX($im);
		$im_Y = ImageSY($im);
	    $ThumbSize = getthumbSize($im_X,$im_Y);
		$im_thumb = ImageCreate($ThumbSize['x'],$ThumbSize['y']);
		ImageCopyResized($im_thumb,$im,0,0,0,0,$ThumbSize['x'],$ThumbSize['y'],$im_X,$im_Y);
		$thumb_name = './upload/thumb-' . $_FILES['userfile']['name'] . $time . ".jpg";
		ImageJPEG($im_thumb,$thumb_name);		
		$newname = $_FILES['userfile']['name'] . $time . ".jpg";
		break;
	}
	return $newname;
    }
}


this same thing happened in PHP 4.3.1, then it was fixed in PHP 4.3.2RC1, now it's present in PHP 4.3.2RC2 again...
I think it has to do with the new version of built-in GD library 2.0.12 against 2.0.11 in PHP 4.3.2RC1