Events with an End Time do not display the end time in the pop-up event summary.
This seems to be caused by a bug in the addEvents function of the dwa.cv.calendarDataStore class (calendarDataStore.js).
The hoverEntry method of the dwa.cv.calendarView class (calendarView.js) is expecting the oEvent object to have a property called hasEndTime, but when the addEvents method of dwa.cv.calendarDataStore creates a new oEvent object from the oEvent objects it receives, the hasEndTime property is not cloned to the new oEvent object.