Spoiler title css issue

I just created a custom themeroller theme for my wordpress site. I installed the theme and added a spoiler to my page. When I view the page the spoiler looks ok from a container standpoint (title bar is very simple navy rectangle with white text and directional arrow) but the type itself is huge (although correct color) and the arrow icon does not exist at all. Any ideas as to what is going on would be appreciated. FYI—I am not seeing anything in the cascade of stylesheets that might be conflicting. Thanks!

http://wordpress.org/plugins/wp-ui/