I have a custom post type (CPT) for printables on my site. After adding 'publicize' to my CPT definition I can see the options to auto-publicize to social networks when adding a new printable (as per this screenshot http://ow.ly/tf4cr). However, my CPT doesn't get publicized to social networks.
Publicize still works for regular 'post' type.
I confirmed that my CPT gets properly parsed by FB test tool.
This is my 'printable' CPT post:
This is a regular 'post' type post:
My Facebook test page shows a regular post but not a CPT post:
My site runs on WP 3.8.1 and Jetpack 2.8. I use Pods plugin to create CPTs.