Remove query strings from CSS javascript files. Place this code in the Genesis child theme functions.php file.

gistfile1.php

<?php
// Don't include opening php tag above

// Remove query strings from css and javascript links
add_filter('script_loader_src', 'wsm_remove_script_version', 15, 1);
add_filter('style_loader_src', 'wsm_remove_script_version', 15, 1);
function wsm_remove_script_version( $src ) {
    $parts = explode( '?', $src );
	return $parts[0];
}