Nice site. One thing I noticed, though, was when you hover over the side navigation, the link only activates when your mouse is right on the text. So sometimes it seems like the item is not clickable. You should make the entire rectangle clickable by adding display: block to your anchor tag and that way, if the text is short, the mouse will still pick up the link.

The site looks great.  And I see you've already used webmachine's tip, which really is a good idea.  Nice site.