Genesis child theme: use an HTML image for your custom header image instead of CSS background.

genesis_header_image.php

<?php

$header = array(
	'default-image'          => get_stylesheet_directory_uri().'/images/pageone.png',
	'random-default'         => false,
	'width'                  => 320,
	'height'                 => 60,
	'flex-height'            => true,
	'flex-width'             => true,
	'default-text-color'     => '#333333',
	'header-text'            => true,
	'uploads'                => true,
	'wp-head-callback'       => 'mytheme_do_site_title',
	'admin-head-callback'    => '',
	'admin-preview-callback' => '',
);
add_theme_support( 'custom-header', $header );

function mytheme_do_site_title() {
	add_filter('genesis_seo_title','mytheme_header_image',10,3);
}

function mytheme_header_image($title, $inside, $wrap) {
	$inside = '
		<a href="'.get_bloginfo('url').'">
			<img src="'.get_header_image().'" height="'.get_custom_header()->height.'" width="'.get_custom_header()->width.'" alt="'.get_bloginfo('name').'" />
		</a>';
	
	return sprintf( "<{$wrap} %s>", genesis_attr( 'site-title' ) ) . "{$inside}</{$wrap}>";
}