#nav li li { /* This controls second-level list li */
	visibility:hidden;
	float:left;
}

#nav li ul { /* This controls second-level list ul */
	display: none;
	float:left;
}

#nav li ul ul { /* This controls third-and-above-level lists */
	visibility:hidden;
	float:left;
}

#nav li:hover ul ul, #nav li:hover ul ul ul, #nav li:hover ul ul ul ul, #nav li.sfhover ul ul, #nav li.sfhover ul ul ul, #nav li.sfhover ul ul ul ul {
	visibility:hidden;
	float:left;
}


/* HERE IS THE PROBLEM */

#nav li:hover ul, #nav li li:hover ul, #nav li li li:hover ul, #nav li li li li:hover ul, #nav li.sfhover ul, #nav li li.sfhover ul, #nav li li li.sfhover ul, #nav li li li li.sfhover ul {
    visibility:hidden;
	float:left;
}