[wp-testers] Error in Twenty Twelve Theme with add_custom_background

[Aero Maxx]

Hi Everyone,

Unsure if this is the correct place, but I just downloaded the 
latest.zip file from the wordpress site, and there seems to be an issue 
with the twenty twelve that was in it.

It complains about the deprecated use of add_custom_background and to 
use add_theme_support ( 'custom-background' ); instead.

I have editted the functions.php file to use add_theme_support ( 
'custom-background' ); instead, but now I get a new error.

Warning: Cannot unset offset in a non-array variable in 
/home/daniel/public_html/development-sites/wordpress-stable.dev/web/public/wordpress/wp-includes/theme.php 
on line 1370 Warning: Cannot use a scalar value as an array in 
/home/daniel/public_html/development-sites/wordpress-stable.dev/web/public/wordpress/wp-includes/theme.php 
on line 1390

I'm not sure how to fix that I have looked in the wordpress code and 
seen where its doing the unset.

>         case 'custom-background' :
>             $defaults = array(
>                 'default-image' => '',
>                 'default-color' => '',
>                 'callback' => '',
>                 'admin-header-callback' => '',
>                 'admin-image-div-callback' => '',
>             );
>
>             $jit = isset( $args[0]['__jit'] );
>             unset( $args[0]['__jit'] );

Thanks
Daniel.