image/spongebob_boo_or_boom_1300898277.jpg isn't a valid image

<br /><br />&nbsp;&nbsp;FILE: /var/www/vhosts/giochiandgiochi.com/httpdocs/uploaded/image.php
<br />&nbsp;&nbsp;LINE: 15

<br /><br />&nbsp;&nbsp;&nbsp;&nbsp;FILE: /var/www/vhosts/giochiandgiochi.com/httpdocs/lib/class/ImageTransform.class.php
<br />&nbsp;&nbsp;&nbsp;&nbsp;LINE: 187
<br />