I got the same problem. The problem only occurs when the user has not made any posts yet. WordPress throws in a 404 error since the loop fails for the user. This is a bbPress bug and should be fixed.
It’s not that hard…
$post->ID, "links" => array("edit" => bbp_get_reply_edit_link(), "trash" => bbp_get_reply_trash_link() ))); ?>
