Blue Horizon problem since 2.1.2

Since upgrading to 2.1.2 my theme is screwy. In FF, the background color stops at the end of the sidebar but it does not in IE. On both, the footer that used to appear at the bottom of the page now appears at the end of the sidebar.

I made no changes to any of the theme files on the upgrade but this problem began with the upgrade from 2.1.1 to 2.1.2.

The site is http://prairieprogressive.com/