gistfile1.php

<?php 

function gp_empty_paragraph_fix($content) {   
	$array = array (
		'<p>[' => '[', 
		']</p>' => ']', 
		']<br />' => ']'
	);
	$content = strtr($content, $array);
	return $content;
}
add_filter('the_content', 'gp_empty_paragraph_fix');