rem: updateStyleSheetForCalendar(aCalendar); 
add: if (!gCachedStyleSheet) { gCachedStyleSheet = getStyleSheet("chrome: } updateStyleSheetForObject(aCalendar, gCachedStyleSheet); 
context:     onCalendarPrefSet: function(aCalendar, aName, aValue) {        updateStyleSheetForCalendar(aCalendar);    },
meta: 10234	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/10234/50998de9c172972637ba79072828269c8c9d9c49/calendar-management.js/buggy/calendar/lightning/content/calendar-management.js