CSS Fight: Gradients vs. Shadows

Which one(s) are the gradients?

So I've started playing with CSS3 Gradients and shadows (a bit late, I know) and I started noticing something about gradients and shadows and found THE MAJOR DIFFERENCE BETWEEN THEM!

Maybe you can see it too!

I've attached an answers image for those who are curious. :)
Contemplating writing a blog post about it and explaining them... should I?

Made using Espresso!

EDIT: also forgot to note that the Topbar is also made by using Shadows.

My point is... STOP DOING THIS! (At least put a background colour in there...)