The shadow of the site name does not show in IE

Unfortunately, text-shadow property is not supported by IE at this time. I am very much aware of this when I developed Mayumi and opted for a graceful degradation instead. I could have used a polyfill but including a javascript file just for text-shadow of the site name is probably too much.

If you really need the text-shadow even in IE, you may want to search for jquery polyfills or probably use a logo image with your site name.