When you added your custom code in the responsive section, you added “padding-top: 80px“….and that is showing up when the responsive css kicks in. Take a look around line 3974 to see what I’m referring to –
/* JBE Added 03.10.13*/
.slider .wrap {
padding-top: 80px;
margin-bottom: -20px;
width: 100%;
}
You could change that padding to “0” if you wanted, and it would remove nearly all of the extra space you’re seeing.