WordPress 3.2 Images Show Weird Query String?

Ever since updating to 3.2, all my post images and thumbnails now have a querey string after them, specifically, “?5f2860”. For example – http://www.reelseo.com/wp-content/uploads/2011/07/mobile-online-video-200×133.jpg?5f2860

Is there anyway to remove this or code it into the theme so that it doesnt have the querey string? Currently, my code is like this.

<?php
$src = wp_get_attachment_image_src( get_post_thumbnail_id($post->ID), '', '' );
if ( has_post_thumbnail($post->ID) ) {
//echo '<link rel="image_src" href="' . $src[0]. '" />';
}

And is there any idea as to why this might be happening or if this was part of 3.2 to add this to all images?

Thanks in advance