No post id returned from Facebook, $fb_response was /n and $fb_page_type was and $wpbook_description was Trial Post to see what happens this time. and $my_title was One More To See What Happens...
That's an error message I get pretty consistently. If I press the Back button the Title seems to be removed but the post content is there.
I have a feeling too that I might be pressing the back button, adding the title again and getting double posting on FB.