WordPress – Improvements to Content API and Onsite Performance

The Sailthru Plugin for WordPress will now auto-detect and push HTTPS-only content to the Sailthru Content Library. In addition, the Sailthru onsite Javascript library will now load onsite asynchronously, improving page load speeds and durability against slower connections. 

To get these features, upgrade your WordPress plugin to v3.4.2 or VIP v3.3.