[ranger82nd]

I had a similar issue, it appears that you're in the same boat. Go to your authentication box and hover over username and password. See the underlines in Firefox? Here's the fix!

skin1.css replace:

.VertMenuItems {
	COLOR: #000000;
	TEXT-DECORATION: none;
	margin-left: 5px;
	line-height: 20px;
	font-size: 11px
}
.VertMenuItems:link {
        COLOR: #333333; TEXT-DECORATION: none;
}
.VertMenuItems:visited {
        COLOR: #333333; TEXT-DECORATION: none;
}
.VertMenuItems:hover {
        COLOR: #000000; TEXT-DECORATION: underline;
}
.VertMenuItems:active  {
        COLOR: #333333; TEXT-DECORATION: none;
}

with this:

a.VertMenuItems {
	COLOR: #000000;
	TEXT-DECORATION: none;
	margin-left: 5px;
	line-height: 20px;
	font-size: 11px
}
a.VertMenuItems:link {
        COLOR: #333333; TEXT-DECORATION: none;
}
a.VertMenuItems:visited {
        COLOR: #333333; TEXT-DECORATION: none;
}
a.VertMenuItems:hover {
        COLOR: #000000; TEXT-DECORATION: underline;
}
a.VertMenuItems:active  {
        COLOR: #333333; TEXT-DECORATION: none;
}

That might help you image underline, but I doubt it. Post back and I'll look further. The line is also under the BUY NOW button!