See URL:
http://testing.backstageweb.net/
On the main menu, mouse over "Donate" - the 4th sub-menu item is being blocked by something, looks like h2#description (?)
Code:
#nav ul li {
background-color:#000000;
color:#fff;
outline:0;
-moz-border-radius: 4px;
border-radius: 4px;
border-bottom:1px dotted #937c52;
-moz-box-shadow: 4px 4px 4px #444;
-webkit-box-shadow: 4px 4px 4px #444;
box-shadow: 4px 4px 4px #444;
font-size:.9em;
}
h2#description {
font-weight: normal;
font-size:1em;
padding-top:8px;
text-align:center;
}