First, thank you for the excellent plugin.
It works right out if the box. The isssues I have found with is with what happens after comment has been successfully posted when a few other comment plugins seem to malfunction. The plugin Simple Facebook Connect does not load the connected users avatar or logged in status right above the comment form. The Marc TV Comment Quicktags do not load at all (located right above the text area inside the commentform selector). jQuery(document).ready(function() for textarea max-length disappears as well.
Also, on custom post type comments the browser needs to be reloaded manually to see the comment. An error message is displayed.