Hi,
I was having the same problem, but I figured out a jQuery hack.
$(".bx-wrapper,.bx-window").width("100%"); - Changing both the bx-wrapper & bx-windows width.
This is how I used it:
<script type="text/javascript">
$(document).ready(function(){
/* Banner slider */
$('#topbanner').bxSlider({
mode: 'horizontal',
easing: 'easeOutBounce',
auto: true,
//captions: true,
speed: 3000,
pause: 8000,
pager: false,
controls: false
});
$(".bx-wrapper,.bx-window").width("100%");
});
</script>
Note:You can change width to whatever you choose.