debug error – custom_background

Hi,

I receive the following error whether I use my genesis child theme or twenty eleven.

Notice: add_custom_background is deprecated since version 3.4! Use add_theme_support( ‘custom-background’, $args ) instead. in /var/www/dev/wp-includes/functions.php on line 2638

I’d like to ensure that this is resolved or won’t be too big of a problem prior to launching the new genesis site.

I am running 3.4.2 and have disabled all plugins.