Just my 2 cents on a solution for the error I got when using a responsive slider, even on pages without the slider. This will also show just a single slide, without the slider-options:
if($('ul.bjqs > li').length > 1) {
$('#una-home-slideshow').bjqs({
responsive : false,
showmarkers : false,
custommarker: true
});
} else if($('ul.bjqs > li').length > 0) {
$('ul.bjqs').css('display','block');
} ;