FYI. Looks like Eventbrite has a bug at the moment. If you update an event in Postevent (creating doesn't seem to be a problem), you might want to click on the link to Eventbrite in the email to make sure it is working. If it doesn't, you can edit the event in Eventbrite and save (without any changes) and it will work again. If you need any help, let me know.
Walter
P.S. Nothing has changed on the Postevent side, so I'm hoping this is a temporary bug in Eventbrite that they will address. Previous attempts to speed this up by contacting support haven't really been helpful....