Need to get rid of margin (or padding) from image on homepage

http://www.ricecreative.co.uk/isight/

Hi,

I am trying to get the image (in screen grab) to but right up against the top and bottom of the frame but can't seem to do it? there seems to be 5 or 6 pixels remaining top and bottom?
Can you look at the CSS to make the image butt up to bottom and top?

Kind regards