Prior to WP3.6, I was having some slight formatting issues with J-Shortcodes accordion plugin. WP3.6 further broke that plugin by making accordion heights the same.
Looking for a fix, I first found WP-UI, but that also had issues (would only work under certain circumstances).
Finally, I found this plugin and installed it. It works perfectly and has exactly the same Cupertino theme that I was using with J-Shortcodes.
Very happy. Thanks to the developer.