Make Firefox 3's autocomplete bar work with a dark theme

I use MurrinaAngustifolium as my gtk theme but, because it is a dark theme, it does not always play nicely with other applications. One problem that I have finally fixed is the drop-down auto-complete menu for the location bar. Put the following code in your userChrome.css file (or use stylish).

@namespace url(http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul);
    .ac-comment {
    font-size: 100% !important;
    color: #dddddd !important;
    }
    .ac-comment[selected="true"] { color: #56aaff !important; }

    .ac-url-text {
    font-size: 100% !important;
    color: #555555 !important;
    }

    .ac-url-text[selected="true"] { color: #666666 !important; }
.autocomplete-richlistbox {
background: #1a1a1a !important;
}
.autocomplete-richlistitem[selected="true"] {
background: #000000 !important;
tooltip {
background-color: #1a1a1a !important;
color: #ffffff !important;
}
}

This code also makes some of the tooltips black.