SE Cloud Update: Responsive and Legacy themes (blog.socialengine.com)
We have some very exciting news. On February 12th we will be releasing brand new fully responsive themes for SocialEngine Cloud! We have been working very hard to bring responsive themes to you and we are very proud of the final product. We think you’re going to love them.

For everyone who currently has customized their SocialEngine Cloud theme, the customization will need to be re-written for the new responsive themes. If no action is taken after the responsive themes are put in place you may run into issues with your theme. Because of this we are providing the necessary steps to keep your legacy theme. If you would like to keep using legacy themes while you are re-writing for the responsive themes or for any other reason, please follow the steps laid out HERE.