I've made a custom select box, with a custom drop down arrow and it looks fine in Google Chrome and Safari but in Mozilla (strangely) and Internet Explorer (not so strangely) the original arrow is still there as well as the new one.
Here is the CSS style:
.sb2_panes select {
padding-top: 5px;
padding-bottom: 5px;
padding-right: 20px;
margin: 0;
-webkit-border-radius: 4px;
-moz-border-radius: 4px;
border-radius: 4px;
background: url(img/search_arrow.png) no-repeat right #f8f8f8;
color: #888;
border: none;
outline: none;
display: inline-block;
-webkit-appearance: none;
-moz-appearance: normal;
appearance: normal;
cursor: pointer;
}
Here is what it looks like in Google Chrome:

Here is what it looks like in Mozilla:

Thanks.