Thats called a drop shadow, It will look better if it wasn't that dark, maybe lighten it up to 75%I noticed on your home page, that the text at the bottom looks blurry. I think this is some type of effect you have used, but it makes it rather difficult to read on screen. I too am not a fan of the light blue against white background found on some of the other pages. Perhaps darken this blue up a bit and make it easier to read.
Best luck with your site.