Space between header and menu

[Trojaan]

Hi Guys,

Can you have a look at my website? http://www.checkensave.nl/
In IE it has some space between the menu and the header and i can't figure out whats the problem. In FF it works perfect. Can someone give me some tips?

Thanks in advance!

[Dr.CSS]

According to the IE web dev. toolbar that is the H1, you may want to try taking the margin-bottom:-5px out of the header, it shows smaller than the H1...