GD/image problem

[thoand]

Is it the script or is the GD that is not precise,
It makes an red border in the bottom and on the right hand side of the picture + the quality is very poor.

	$file = "../../images/dynamic/images/$orgFile";
	$src = ImageCreateFromJPEG($file); 
	$filesize = filesize($file); 
	$org_h = imagesy($src);
	$org_w = imagesx($src);

	if (isset($keepProp)) {
		if ($org_w > $org_h) {
			$cfg->width = $thumbWidth;
			$cfg->height = floor ($cfg->width * $org_h / $org_w);
		}
		else  {
			$cfg->height = $thumbHeight;  
			$cfg->width  = floor ($cfg->height * $org_w / $org_h);
		}
	}
	else {
		$cfg->width = $thumbWidth;
		$cfg->height = $thumbHeight;
	}
	$img = ImageCreate($cfg->width,$cfg->height);
	ImageCopyResized ($img, $src, 0, 0, 0, 0, $cfg->width, $cfg->height, $org_w, $org_h ); 
	ImageJPEG($img, "../../images/dynamic/thumbs/$orgFile", 100);
	ImageDestroy ($img);
	ImageDestroy ($src);