$y = new File_MimeType();
$ext = $y->toExt(trim((string) $this->as_mimetype ));
+ print_r($ext);exit;
+
// if the mimetype is not converted..
// then the filename should be original.{size}.jpeg
$fn = $img->getStoreName() . '.'. $this->size . '.jpeg'; // thumbs are currenly all jpeg.!???