Firefox browser showing extra space between menu and slider

Question

I am helping a friend with his site and I am using IE, Chrome and firefox as well as safari to make sure the site is multi browser compatible. Chrome, IE and Safari all show the menu to be as it should but firefox adds 10 pixels between the menu and the slider. I tried to find the source of the error using chrome and mozilla developer tools, and I cannot see where it is comming from. Here is the link

Answer 1

Adding a negative margin to the div containging the slider resolved my issue.