rem: var tzid = this.getCalendarProperties("X-NSCP-CALPROPS-TZID", "", {}); 
add: var tzid = this.getCalendarProperties("X-NSCP-CALPROPS-TZID", {}); 
context:     get defaultTimezone() {        var tzid = this.getCalendarProperties("X-NSCP-CALPROPS-TZID", "", {});        if (tzid.length < 1) {            return "UTC"; // fallback        }        return tzid[0];    },
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/8c73ea0e85be532b32635bc10b6cd12610aa68f8/calWcapCalendar.js/buggy/calendar/providers/wcap/calWcapCalendar.js