Sydney Pro - Header black background bleeds down

I’ve purchased Sydney Pro. I installed the files you provide, viz. settings, demo content, portfolio plugin, and the new timeline widget. You can see it at

However, when I view the site, and scroll down, the top navigation menu background (black) gets overlaid over the screen. Why is that, and how can I fix it?

Please post a link to your site so i can see problem and provide you solution sir.

You have some custom CSS there for #masthead which is causing this. Remove it please and the problem will be gone.