Beautiful, breaks Shortcode Ultimate

I used version 1.3.4 for quite a while and could not have been happier. I fought off the subsequent upgrades, because I found the updated large navigation on the single page view is a bit ugly. I recently updated the theme by accident, and discovered it breaks the two Shortcode Ultimate shortcodes I regularly use, box and responsive embed. The style seems to be completely stripped from the box shortcode and YouTube videos still embed, but they are no longer responsive, causing them to extend beyond the boundary of the post in lower resolutions.