Plone 4 was updated on 04/24/2015 to add new support for SVG images, upgraded bootstrap and jquery frameworks, and general theme bugfixes
Plone 4 was updated this past weekend, 02/14/2014, to integrate the Localist calendar widgets and introduce the Faculty Content Type
Changes that were applied on Friday, November 22, 2013
We've made improvements to the Prime Time Marketing Theme and there is action required on your part.
We've made the process easier for you to follow and know what the status of all of your sites are.
The prime time marketing theme is available for use in Plone 4 sites.