If you have not heard of Tilt, this is how Mozilla’s article describes it.

Tilt is a Firefox addon that lets you visualize any web page in 3D.

You can download it via the Tilt Firefox addon. It allows you to see exactly what your site would look like if elements’ z-indexes actually changed their positions in 3D space. So you can see what is overlapping what and why things might be going wrong.

I ran our site through it and got a nice result with the logo. You can actually see the element hanging over the edge of the other elements.

So next time you are wondering just how your page is coming together, boot up this tool and have a look around. Or just run it over some other sites to see how they do things.