According to my WordPress.com stats, I recently had a new post take over the 5th most popular spot. However, the previous post is still displayed in the sidebar. I am using the php function instead of the widget. Code I'm using is below. I have also deactivated and activated the WordPress Stats and Popular Posts plugins, but no change.
<?php WPPP_show_popular_posts('title=<h2>Popular Posts</h2>&show=posts'); ?>
Any thoughts on what's not working?