Empty div class on shopping cart and checkout pages


I'm theming my marketpress store without using any custom templates. All was going swimmingly until I got to the shopping cart and checkout pages.

Those pages are in a div with an empty css class so I can't target them for styling. <div class="">.

I'm using the Genesis Framework with a child theme.

I'm not sure if it's a marketpress issue...a genesis issue...or very possibly, a me issue.

I'm looking to be able to populate that class so I can target it. Any help would be greatly appreciated!