Hi Peter,
Here’s the JS solution using jQuery:
/* Fix overlap arrows bug on Responsive Menu plugin */
/* span with class 'rm-append-active' is rendered twice when the current page is a link item from a dropdown parent on a menu */
var $arrowDouble = $('.rm-append-active').length;
/* if span.rm-append-active is rendered twice, hide the first one */
if ($arrowDouble == 2){
$('span.rm-append-active:first-of-type').hide();
}
There’s also a CSS workaround which can be found here:
http://stackoverflow.com/questions/6447045/css3-selector-first-of-type-with-class-name
In that case:
span.rm-append-active ~ span.rm-append-active {
display: none;
}