Header Image

I have a problem with my Header-Image, since one of the last updates. Please look at http://schinderhannes-mtb.org/wp-content/uploads/schindertop.jpg How can I reduce the red space? I tried

#hgroup { padding-bottom: 0px; }
#site-logo { padding-bottom: 0; }

But it doesn´t work... Thanks for help! Dave