Is your feed showing up at the top of the page after updating to Jetpack 2.0.4 when using the Feed Them Social WordPress Plugin?
Here is the fix! :)
In file class.jetpack-post-images.php (jetpack plugin directory), replace line 254:
$html = apply_filters( 'the_content', $html->post_content );
$html = $html->post_content;
Thanks to Timperator on thread http://wordpress.org/support/topic/jetpack-204-breaks-nextgen-galleries?replies=26#post-3646773