Wordpress Topmenu Issue

Can someone help me out?

I'm having a site, builed with WordPress but it just seems to fail in the TopMenu part, thos most important part of my site.

My website

Just hold your mouse on "seizoen 2010" and find out the difference with "seizoen 2009".

Hope someone knows how to fix this issue 开发者_StackOverflow社区cause it's annoying as hell!

Thanks in advance!

You should modify css rules for #front_menu li ul ul For example :

#front_menu li ul ul {
    border-top: 1px solid #ACACAB;
    left: 100px;
}