Problem solved, see http://facility9.com/2008/07/17/ie7-dropdowns-and-z-index
.sf-menu li:hover, .sf-menu li.sfHover{ z-index: 99; } instead of .sf-menu li:hover ul, .sf-menu li.sfHover ul{ z-index: 99; }
Problem solved, see http://facility9.com/2008/07/17/ie7-dropdowns-and-z-index
.sf-menu li:hover, .sf-menu li.sfHover{ z-index: 99; } instead of .sf-menu li:hover ul, .sf-menu li.sfHover ul{ z-index: 99; }