Does anybody know what causes the debug message
"Error loading timezone data from file system. This is a serious problem. Calendar data is not guaranteed to be accurate."?
It appears when calling [EKEventStore predicateForEventsWithStartDate:endDate:calendars:],
but only on the device, not in the simulator. My app calls this method several times with different dates,
but I cannot see any relation between the dates used and the appearance of this message.
It appears to show up randomly.