#top #title ul#menu li ul {
  clip:rect(0px, 1000px, 1000px, -10px) !important;
}

#top #title ul#menu li:hover ul li ul,
#top #title ul#menu li.hover ul li ul {
  /* clip:auto; // WebKit no likee: https://bugs.webkit.org/show_bug.cgi?id=36772 */
  clip:rect(-10px, 1000px, 1000px, -10px) !important;
}