I have a slideshow block under the menu but even with a normal block under the menu it gives me a gap between the menu and the block. I can remove the other gaps/gutter between the different blocks but the one underneath the menu I can not get rid of. As per attached image.

There's nothing in the standard "Navigation" and "Top Bar" blocks. When I look at the page.tpl.php I think the gap comes in between these two sections.

As i said before, I can remove all the other gaps that exists between the blocks but not this one.

I hope someone can shed some light on this :) thanks.