Remove stubborn underline from link

You are not applying text-decoration: none; to an anchor (.boxhead a) but to a span element (.boxhead).

Try this:

.boxhead a {
    color: #FFFFFF;
    text-decoration: none;
}

The anchor tag (link) also has pseudo-classes such as visited, hover, link and active. Make sure your style is applied to the state(s) in question and that no other styles are conflicting.

For example:

a:hover, a:visited, a:link, a:active
{
    text-decoration: none;
}

See W3.org for more information on user action pseudo-classes :hover, :active, and :focus.

text-decoration: none !important should remove it .. Are you sure there isn't a border-bottom: 1px solid lurking about? (Trace the computed style in Firebug/F12 in IE)