Hi.
After upgrading to the latest Invent theme, one of my pages located here: http://eecs.lassonde.yorku.ca/programs/undergraduate/
.. was showing under every single new entry:
Notice: Undefined variable: post_id in /local/wordpress/wp-content/plugins/livemesh-invent-shortcodes/templates/shortcodes/loop-posts.php on line 155
I ended up adding to the top of loop-posts.php the following:
$post_id = get_the_ID();