[theme-reviewers] Something we need to check for 3.4 appearance -> background

[Michael Fields]

> - If the theme uses the core custom-background functionality, and also
> specifies a background-image for the site in the stylesheet, then the
> background image MUST be on the body tag, and the
> body.custom-background MUST have background-image: none as a rule in
> the stylesheet as well. This is to ensure that the custom background
> image functionality works properly when the user elects to not have a
> background-image.

From my tests, it appears that the background image should not be added to the body via style.css. If no background styles are present in style.css and both a default color and image are passed as args to add_theme_support(), the feature works great.