wpuf_editpost not parsing comment to edit

When I click a link from the Dashboard page the Edit page opens but no post is parsed and the [wpuf_editpost] shortcode is shown as text alone.

I do have an issue with the headers in that when I try to create a new post I get this:

array(8) { [“_wpnonce”]=> string(10) “133b121fdf” [“_wp_http_referer”]=> string(20) “/wordpress/new-post/” [“wpuf_post_title”]=> string(13) “New Post Test” [“category”]=> array(1) { [0]=> string(2) “10” } [“wpuf_post_content”]=> string(35) “This is a new post” [“wpuf_new_post_submit”]=> string(12) “Submit Post!” [“wpuf_post_type”]=> string(4) “post” [“wpuf_post_new_submit”]=> string(3) “yes” }
Warning: Cannot modify header information – headers already sent in C:\Users\paul.wilkinson\Desktop\xampp\htdocs\wordpress\wp-includes\pluggable.php on line 876

Could this be linked?

http://wordpress.org/extend/plugins/wp-user-frontend/