Your download link is confusing, it didn't work for me the first time.

The mistake you make is that you make it look like a button, it even looks 3D when you hover over it (extra shadow) and the little icon also makes it look like one.
Little did I know that what I thought to be a button label, actually turns out to be a link. It doesn't even look like a link (no underline), plus it doesn't stick to the standard for text links on your site, because your text links are "blue" and turn "orange" when you hover over them.

It's just sloppy web design, learn from Google: