The theme has a built in option to disable the mootools.js file that is loaded by Joomla as standard. This removes a 70KB file from load time resulting in greater performance.
Cross browser consistency is core to any template. Afterburner is compatible with all major and modern browsers: FF3.5, Safari 4, Opera 9.6 & IE6, 7, 8.
XHTML and CSS validation, in relation to W3C, is important in any theme as to ensure maximum compatibility. Afterburner is fully XHTML and CSS valid.