Hi Dave, I visited http://www.discoverbuenosaires.com/events/2013-03-03/ and clicked the iCal Import Day’s Events link and it took me to a dump of data in iCal format – with a correct 200 OK status (rather than a 404).
… In fact I just found another thread and this clicked – I’m guessing you’ve since added an event that populated that same date, but that this happens when days have no events – does that sound accurate?
Dave, I’m going to go ahead and close this since we never heard anything back. But if you need further help please just create a new thread and we’ll get you sorted.