.tickercontainer { /* the outer div with the black border */
width: 450px;
height: 30px;
margin: 0;
padding: 0;
overflow: hidden;
}
.tickercontainer .mask { /* that serves as a mask. so you get a sort of padding both left and right */
position: relative;
top: 8px;
height: 18px;
/*width: 718px;*/
overflow: hidden;
}
ul.newsticker { /* that's your list */
position: relative;
/*left: 750px;*/
font: bold 14px Verdana;
color:#009;
list-style-type: none;
margin: 0;
padding: 0;
}
ul.newsticker li {
float: left; /* important: display inline gives incorrect results when you check for elem's width */
margin: 0;
padding-right: 15px;
/*background: #fff;*/
}

ul.newsticker {
    //important to enable css3 transitions properly 
    -webkit-transition: all 0s linear;
    -moz-transition: all 0s linear;
    -o-transition: all 0s linear;
    transition: all 0s linear;
    list-style:none;
    margin:0;
}