Problem: Admin, drop box width too narrow (see attachment)
/components/com_virtuemart/assets/js/chosen.jquery.min.js
{id:this.container_id,"class":"chzn-container"+(this.is_rtl?" chzn-rtl":""),style:"width: "+this.f_width+"px;"}
SOLUTION => Change to:
{id:this.container_id,"class":"chzn-container"+(this.is_rtl?" chzn-rtl":"")}