The {embed_post:*} variables are not working correct in version 1.5.rc3.4. I guess the following code is incorrect:
common.php:466
http://pastebin.com/w1H9uSr9
$embed_posts = $query->query($_SERVER["QUERY_STRING"]);
In my case the ID or title of the homepage are always displayed, also if i embed the form on another page!