Kramarz on "[Plugin: Contact Form 7] wpcf7-quiz-label needs extra css"

.wpcf7-quiz-label {display: block;}

That's what it is missing :-)
Without it there's a small issue in IE, causing spliting the quiz question in 2 lines.

If any developer reads it, would be nice to add it in future update.

Kind Regards

http://wordpress.org/extend/plugins/contact-form-7/