just wanted to say Tom, i’m also seeing this problem. (wp-show-posts-pro-1.0-beta.2)
i click on page 2, url changes to page 2 but content refreshes and then shows same as page 1.
if i activate AJAX Pagination then it just duplicates the first page again.
if you didnt get the link yet to see the issue, let me know and i can send you my page with the issue.