I thought I was following the development of WordPress 3.7 fairly closely but something totally missed my notice and only caught my attention when a plugin I develop stopped working with the latest version of WordPress.
do_action( 'save_post', $post_ID, $post, $update );
Notice anything different? The difference is that this hook used to only have 2 parameters, “$post_ID”, and “$post” but NOW it has a third one, “$update”. It’s actually a nice addition as it makes it super easy to determine whether the post is being updated or not. However, due to the way I hooked into this action (with a function that had extra parameters on it), Organize Series broke. Easy enough fix, but quirky enough that I thought it deserved a post as I haven’t seen anybody mention this little addition!