Description:
------------
Getimagesize return nothing when detect some image file.
<?php

$sURL = "http://blog.yam.com/pescado/2f940406.jpg";
print_r(getimagesize($sURL));

?>

Reproduce code:
---------------
<?php
$sURL = "http://blog.yam.com/pescado/2f940406.jpg";
print_r(getimagesize($sURL));
?>

Expected result:
----------------
Array
(
    [0] => xxx
    [1] => yyy
    [2] => 2
    [3] => width="500" height="354"
    [bits] => 8
    [channels] => 3
    [mime] => image/jpeg
)


Actual result:
--------------
nothing