There is a black banner going across the top of the screen where the menu button and logo is located. This banner follows you when you scroll down the page and covers a good portion of the page including the images in the banner. An interesting issue is that this black banner only shows on SOME computers. I pulled up the website on several different computers, cell phones, and then I tried it on Chrome, then Internet Explorer and it chooses where it wants to show up.
Do you have the URL of your site?