Styles change over the different Q2A versions so it makes sense that something that looks in a given way on 1.7.0 looks different in future releases. Bearing that in mind, I posted the answer with a screenshot :)
The plugin needs to be rewritten so that the HTML output is different and not so ridiculously hard to style. As I said, it makes no sense to fix the HTML using CSS (unless you don't know anything of PHP to fix the HTML, of course).