Builder Responsive: Introduction
Starting with version 4.0, Builder 4.0 uses responsive design, so your site will respond to different screen sizes like phones and tablets. Our newly-updated Foundation Series themes are now fully-responsive, and pave the way for future mobile responsive theme designs.
Responsive-ready Child Themes
Issues with IE
Unfortunately, responsive sites don't work very well on Internet Explorer < 9. That being the case, our themes have rules for IE 6, 7, and 8 that keep the site full width. This may not be ideal, but it is certainly much better than having a terrible-looking site in IE < 9.
- For more information, visit: http://ithemes.com/forum/topic/37756-builder-and-avail-theme-not-responsive/#entry172777